<?xml version='1.0' encoding='UTF-8'?><?xml-stylesheet href="http://www.blogger.com/styles/atom.css" type="text/css"?><feed xmlns='http://www.w3.org/2005/Atom' xmlns:openSearch='http://a9.com/-/spec/opensearchrss/1.0/' xmlns:georss='http://www.georss.org/georss' xmlns:gd='http://schemas.google.com/g/2005' xmlns:thr='http://purl.org/syndication/thread/1.0'><id>tag:blogger.com,1999:blog-36380956</id><updated>2012-01-21T16:01:38.329+08:00</updated><category term='S. Katzenbeisser'/><category term='cipher'/><category term='JPEG steganography'/><category term='Jsteg-Shell'/><category term='OutGuess'/><category term='N. Johnson'/><category term='JPEG steganalysis'/><category term='introduction'/><category term='package'/><category term='SIP 2006'/><category term='wired'/><category term='IHW 2001'/><category term='news'/><category term='books'/><category term='VP8'/><category term='WebP'/><category term='F5'/><category term='G. Kessler'/><category term='IHW 2008'/><category term='conference'/><category term='G. Tena'/><category term='application'/><category term='Jsteg'/><category term='QIM'/><category term='RS steganalysis'/><category term='Y.-K. Lee'/><category term='image compression'/><category term='T. Tan'/><category term='IHW 2004'/><category term='Hide'/><category term='G. Wornell'/><category term='A. Latham'/><category term='Alan Turing'/><category term='T. Sharp'/><category term='A. D. Ker'/><category term='papers'/><category term='IHW 1999'/><category term='MP3Stego'/><category term='JPHide'/><category term='A. Westfeld'/><category term='attack'/><category term='ISC 2008'/><category term='jpeg'/><category term='steganalysis'/><category term='MP3'/><category term='audio steganography'/><category term='ICICIC 2007'/><category term='Chi-Square attack'/><category term='Google'/><category term='LSB matching'/><category term='N. Provos'/><category term='H. Noda'/><category term='IHW 2002'/><category term='J. Fridrich'/><category term='Huffman coding'/><category term='code-breaker'/><category term='A. Gutub'/><category term='null cipher'/><category term='H. Farid'/><category term='F. Petitcolas'/><category term='history'/><category term='dictionary'/><category term='stego-tools'/><category term='A. Pfitzmann'/><category term='Arabic text steganography'/><category term='PSIVT 2009'/><category term='statistics'/><category term='S-Tools'/><category term='writing'/><category term='LaTeX'/><category term='911'/><category term='WCE 2008'/><title type='text'>Lee's Stego Research Notes</title><subtitle type='html'>Research Notes in Steganography &amp; Steganalysis by YKLee</subtitle><link rel='http://schemas.google.com/g/2005#feed' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/posts/default'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default?max-results=100'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/'/><link rel='hub' href='http://pubsubhubbub.appspot.com/'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><generator version='7.00' uri='http://www.blogger.com'>Blogger</generator><openSearch:totalResults>99</openSearch:totalResults><openSearch:startIndex>1</openSearch:startIndex><openSearch:itemsPerPage>100</openSearch:itemsPerPage><entry><id>tag:blogger.com,1999:blog-36380956.post-1750592728128971429</id><published>2012-01-21T15:55:00.002+08:00</published><updated>2012-01-21T16:01:38.516+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='package'/><category scheme='http://www.blogger.com/atom/ns#' term='JPEG steganography'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Package: File Camouflage</title><summary type='text'>Want to save a copy of your personal file on a usb pendrive but you are worried that, in case of theft, someone will be able to access your data?With Free File Camouflage you can hide your files inside a jpeg image!The software can be used with the main interface or via the explorer "send to" context menu (the first time you only need to select a directory with some images).All the files are </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/1750592728128971429/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2012/01/package-file-camouflage.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1750592728128971429'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1750592728128971429'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2012/01/package-file-camouflage.html' title='Package: File Camouflage'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6002545822997040299</id><published>2011-09-28T10:18:00.002+08:00</published><updated>2011-09-28T10:22:12.487+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 中國佈「網」 電子監控商務客</title><summary type='text'>〔自由時報 2011/09/28 編譯陳成良、記者陳炳宏 綜合報導 原始新聞連結〕華盛頓郵報二十七日報導，中國是美國第二大貿易夥伴，不過許多美國企業商務旅客越來越擔心遭到中國精密且無孔不入的電子監控。儘管俄羅斯、以色列與法國過去也都有竊聽商務客的前例，但都不像中國這般明目張膽。中國為協助發展該國經濟，往往鎖定企業進行網路監控。中國不擇手段 鎖定企業監控專家表示，儘管美國企業界也有工業間諜活動，但不像中國那樣誇張，而且美國政府據報導不會替美國產業執行經濟間諜活動。一般經濟間諜是為了取得工商業的競爭優勢，但只有中國的經濟間諜是由政府支持，因為許多中國企業都是國營企業。報導援引白宮國安會亞洲政策前資深主任、美國智庫布魯金斯研究所學者李侃如（Kenneth Lieberthal）的話稱：「我被告知，如果你使用一支iPhone或黑莓機，手機裡的所有資料，包括通訊錄、行事曆、電郵等，都能在瞬間被下載</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6002545822997040299/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2011/09/news.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6002545822997040299'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6002545822997040299'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2011/09/news.html' title='News: 中國佈「網」 電子監控商務客'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-8752943021807327782</id><published>2011-08-17T10:28:00.008+08:00</published><updated>2011-09-28T10:21:36.109+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 論文維國格 禁納入 China</title><summary type='text'>（中央社記者林思宇台北16日電）原始新聞連結教育部今天表示，只要是代表台灣在國際上發表論文，禁止把國籍寫成「China」，使用「China」作為國籍發表的論文都不會承認，只能用「Taiwan」或「ROC」。自由時報報導，中國北京大學教授饒毅無理要求共同發表學術論文的台灣清華大學教授江安世，通訊地名必須改為「中國台灣（Taiwan, China）」，還寫信恐嚇行政院國家科學委員會，要求放棄「Taiwan」或「Taiwan, R.O.C.」政策，否則將阻礙兩岸學術合作。清華大學副校長葉銘泉表示，國際論文發表時，都要寫作者的任職機構或是學校，這部分會提到國籍；台灣學者都會寫「Taiwan」，他認為，這是個個案，並不會影響到兩岸學術交流。教育部次長林聰明表示，台灣學者發表論文時，會提到國籍的部分，都要使用「Taiwan」或是「ROC」，使用「China」教育部一概不會承認，教師在升等、點數等，</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/8752943021807327782/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2011/08/news-china.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8752943021807327782'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8752943021807327782'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2011/08/news-china.html' title='News: 論文維國格 禁納入 China'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-198804607706398741</id><published>2011-08-05T12:30:00.006+08:00</published><updated>2011-08-05T12:42:46.375+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 最大規模駭客攻擊 指向中國</title><summary type='text'>(自由時報 2011/08/04 編譯陳成良、記者羅添斌 綜合報導 原始新聞連結)美國資安業者「邁克菲」（McAfee）發現史上最大規模連環網路攻擊，這項代號為「暗鼠行動」的駭侵，包括聯合國、台灣等國政府、國防承包商、多家國際企業等七十二個機構的網路都遭駭客攻擊。專家認為，中國極可能是幕後黑手！包括台灣 全球 72 機構遇襲台灣軍方資訊將領則指出，中國網軍每每在研發新式網路攻擊戰法時，對台灣發動實驗式攻擊，藉以驗證新戰法效果，因此台灣常首當其衝。這些攻擊行動能量都很大，背後一定有國家力量支撐。McAfee 三日公布的十四頁報告中指出，據信這些攻擊背後有「國家角色」主導。雖然 McAfee 不願一語道破，但聽過相關簡報的美國國際戰略研究中心網路專家路易斯指出，所有證據都指向中國，例如一直到北京舉辦奧運前，台灣與一些國家的奧委會都是攻擊重點，顯示中國就是幕後黑手。路易斯表示，</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/198804607706398741/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2011/08/news.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/198804607706398741'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/198804607706398741'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2011/08/news.html' title='News: 最大規模駭客攻擊 指向中國'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-3976932938641449579</id><published>2011-05-02T17:15:00.007+08:00</published><updated>2011-05-02T17:24:08.177+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><category scheme='http://www.blogger.com/atom/ns#' term='911'/><title type='text'>News: 歐巴馬：賓拉登被美軍槍擊死亡</title><summary type='text'>新頭殼 newtalk 2011.05.02 林禾寧 綜合外電 原始新聞連結美國總統歐巴馬在美東時間星期日（1日）晚間（台灣時間 2 日早上 11 時 30 分左右）宣佈， 蓋達組織領導人賓拉登（Osama bin Laden）已經在巴基斯坦被美軍擊斃。歐巴馬在美國白宮的這場電視演說中表示，美軍依據情報單位所提供的消息，在上週和賓拉登藏身地的巴基斯坦當局合作，發動地面攻擊將賓拉登擊斃。歐巴馬也證實，目前賓拉登的遺體在美國的掌握之中。歐巴馬指出，美國情報單位和軍方在去年8月首次向他通報獲得賓拉登下落的消息，發現賓拉登藏身於巴基斯坦境內；他在上星期批准美軍對賓拉登藏身地點所展開的攻擊行動。歐巴馬強調，美國人民已容忍賓拉登 10 年了，這次賓拉登被狙擊死亡，可說是「正義的制裁」，但美國的反恐行動尚未結束。新頭殼網站圖片來源：達志影像/路透社。賓拉登被擊斃的消息傳開後，</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/3976932938641449579/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2011/05/news.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/3976932938641449579'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/3976932938641449579'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2011/05/news.html' title='News: 歐巴馬：賓拉登被美軍槍擊死亡'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-4326953355344404216</id><published>2011-03-07T21:27:00.002+08:00</published><updated>2011-03-07T21:33:30.126+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 中國論文量世界第一 濫竽充數</title><summary type='text'>【中央社 2011-03-07 原始新聞連結】　　中國大陸論文數量世界第一，但引用率極低，排在全球 100 名外。大陸國家統計局前局長李德水呼籲，盡快改革大陸科研體制和對科研人員評價考核機制，絕不能以發表多少論文去論英雄。綜合大陸媒體報導，全國政協經濟委員會副主任李德水在大陸全國政協11屆4次會議記者會上，提出上述呼籲。　　李德水說，「我想跟大家說兩個第一，中國大陸現在有兩個世界第一。一個是研發人員，到2009 年年底，我們有 318 萬 4000 名研發人員、科技人員，這是世界第一，超過美國；一個是近年來我們科研人員發表的期刊、論文數量已經超過美國，居世界第一。」李德水進一步說，「但是這些論文平均引用率卻排在世界 100 位之後。」　　此外，也有人大代表指出，中國目前尤其缺乏高品質的自然科學論文，應當注意到中國「SCI」（科學引文索引）數字光環背後，存在數據造假、剽竊、抄襲等諸多問題。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/4326953355344404216/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2011/03/news.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4326953355344404216'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4326953355344404216'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2011/03/news.html' title='News: 中國論文量世界第一 濫竽充數'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7140481895965292745</id><published>2011-02-17T12:07:00.006+08:00</published><updated>2011-02-17T12:16:57.114+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='wired'/><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>FBI: Spies Hid Secret Messages on Public Websites</title><summary type='text'>[Wired Original Link]# By Noah Shachtman# June 29, 2010  1:11 pm# Categories: Spies, Secrecy and Surveillance Moscow communicated with a ring of alleged spies in America by encoding instructions in otherwise innocent-looking images on public websites. It’s a process called steganography. And it’s one of a slew of high-tech and time-tested methods that the deep-cover agents and their Russian </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7140481895965292745/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2011/02/fbi-spies-hid-secret-messages-on-public.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7140481895965292745'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7140481895965292745'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2011/02/fbi-spies-hid-secret-messages-on-public.html' title='FBI: Spies Hid Secret Messages on Public Websites'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6676651598375436966</id><published>2010-11-30T13:57:00.011+08:00</published><updated>2010-11-30T15:30:20.934+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='MP3'/><category scheme='http://www.blogger.com/atom/ns#' term='MP3Stego'/><title type='text'>MP3 Frame Size and Frame Length</title><summary type='text'>最近在閱讀有關 MP3stego 的相關論文, 由於 MP3stego 基本上是將機密藏在 Frame Length 之中, 因此上 Google 搜尋了一些 MP3 規格書的相關訊息。由於 MP3 規格書 (MPEG I Audio: ISO/IEC 11172-3, MPEG II Audio: ISO/IEC 13818-3) 必須要付費購買才拿得到, 所以只好從其他網頁中尋求相關訊息。在 MPEG AUDIO FRAME HEADER 這個網頁之中, 有一段文章非常值得參考, 如下: How to calculate frame lengthFirst, let's distinguish two terms frame size and frame length. Frame size is the number of samples contained in a frame.</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6676651598375436966/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/11/mp3-frame-size-and-frame-length.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6676651598375436966'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6676651598375436966'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/11/mp3-frame-size-and-frame-length.html' title='MP3 Frame Size and Frame Length'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-4636569372615725219</id><published>2010-11-17T00:37:00.010+08:00</published><updated>2010-11-17T10:16:10.590+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='MP3Stego'/><category scheme='http://www.blogger.com/atom/ns#' term='F. Petitcolas'/><category scheme='http://www.blogger.com/atom/ns#' term='audio steganography'/><title type='text'>MP3stego Offical Website</title><summary type='text'>MP3stego 是一套能將文字檔 (副檔名為 .txt) 藏入音訊檔 (副檔名為 .wav) 的隱藏工具, 藏有機密訊息的音訊檔儲存為 MP3 格式(MPEG Audio Layer III format)。官方網站: http://www.petitcolas.net/fabien/steganography/mp3stego/發表日期: August 1998作者: Fabien Petitcolas,畢業於 the University of Cambridge, 指導教授是 Prof. Ross Anderson。 F. Petitcolas 也是第一本有關 steganography 書籍 "INFORMATION HIDING techniques for steganography and digital watermarking" 的共同作者。目前在 Microsoft</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/4636569372615725219/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/11/mp3stego-offical-website.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4636569372615725219'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4636569372615725219'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/11/mp3stego-offical-website.html' title='MP3stego Offical Website'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7214717384277299329</id><published>2010-10-01T22:01:00.001+08:00</published><updated>2010-10-01T23:31:56.348+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><category scheme='http://www.blogger.com/atom/ns#' term='image compression'/><category scheme='http://www.blogger.com/atom/ns#' term='VP8'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><category scheme='http://www.blogger.com/atom/ns#' term='Google'/><category scheme='http://www.blogger.com/atom/ns#' term='WebP'/><title type='text'>News: Google 發表影像壓縮新技術 取代過時的 JPEG</title><summary type='text'>數位時代網站新聞精選 原始連結撰文者: 戴佳慧 日期：2010/10/01一向以完美網頁瀏覽體驗為己任的 Google 再出新招！今天 Google 在 Chromium 官方部落格上發表了一種全新影像格式 WebP，能大幅改善網頁圖檔的傳輸效能。經過 WebP 壓縮的影像，檔案大小比常見的 JPEG、GIF、PNG 格式平均減少了 39%，色調和色彩演繹相較之下也毫不遜色。Chromium 部落格指出，今日的網頁傳輸有 65% 用在影像和照片下載。在行動網路和頻寬有限的情況下，使用者點開網頁之後，還要耐心等待圖片緩緩展開。為了提供使用者更順暢、更愉快的網頁瀏覽經驗，Google 利用全新壓縮技術 VP8 設計了一套新的影像壓縮格式 WebP，大幅減少圖檔大小，讓網頁下載更迅速。VP8 原本是由美國上市科技公司 On2 所開發出來的視訊壓縮格式，Google 在今年年初收購了On2，</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7214717384277299329/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/10/news-google-jpeg.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7214717384277299329'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7214717384277299329'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/10/news-google-jpeg.html' title='News: Google 發表影像壓縮新技術 取代過時的 JPEG'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7344303296010733611</id><published>2010-08-31T17:21:00.011+08:00</published><updated>2010-08-31T22:57:52.288+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='A. D. Ker'/><category scheme='http://www.blogger.com/atom/ns#' term='steganalysis'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='LSB matching'/><title type='text'>Resampling and the Detection of LSB Matching in Colour Bitmaps</title><summary type='text'>Andrew D. KerOxford University Computing Laboratory, Parks Road, Oxford, EnglandSecurity, Steganography, and Watermarking of Multimedia Contents VII,San Jose, CA, USA., 17-20 January 2005, pp. 1-15(Original SPIE Digital Library Link)AbstractWe consider the problem of detecting the presence of hidden data in colour bitmap images. Like straightforward LSB Replacement, LSB Matching (which randomly </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7344303296010733611/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/08/resampling-and-detection-of-lsb.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7344303296010733611'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7344303296010733611'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/08/resampling-and-detection-of-lsb.html' title='Resampling and the Detection of LSB Matching in Colour Bitmaps'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-3502171970165428219</id><published>2010-08-21T11:28:00.010+08:00</published><updated>2010-12-25T19:03:27.225+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Y.-K. Lee'/><category scheme='http://www.blogger.com/atom/ns#' term='steganalysis'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><title type='text'>A Method for Automatic Identification of Signatures of Steganography Software</title><summary type='text'>Graeme Bell and Yeuan-Kuen LeeIEEE Transactions on Information Forensics and SecurityVolume 5, Issue 2 (June 2010) pp. 354 - 358.( Original IEEE Xplore Link )AbstractA fully automated, blind, media-type agnostic approach to steganalysis is presented here. Steganography may sometimes be exposed by detecting automatically characterized regularities in output media caused by weak implementations of </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/3502171970165428219/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/08/method-for-automatic-identification-of.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/3502171970165428219'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/3502171970165428219'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/08/method-for-automatic-identification-of.html' title='A Method for Automatic Identification of Signatures of Steganography Software'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><media:thumbnail xmlns:media='http://search.yahoo.com/mrss/' url='http://lh6.ggpht.com/_dAircxyIh00/TRW9dUZ3h5I/AAAAAAAAF3U/Yo9L78zg7_4/s72-c/20101225-Starbucks-04.jpg' height='72' width='72'/><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-2296281359372819272</id><published>2010-08-19T22:47:00.003+08:00</published><updated>2010-08-19T22:53:34.230+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 論文抄別人 博士碩士都沒了</title><summary type='text'>(聯合新聞網 2010/08/18 記者饒磐安 台北縣報導 原始新聞連結 Yahoo 新聞網)政大歷史研究所博士生張孟珠前年四月上網查資料，發現她的碩士論文遭林姓女博士生抄襲，因而提告，智慧財產權法院法官找中研院法律研究所專家鑑定，認定林女論文卅二處抄襲，林女因被撤銷碩士學位，和博士班入學資格。智慧財產權法院法官依違反著作權法，判林女須賠償張女廿二萬元，並在報紙全國版下半版刊登判決書。張孟珠是中研院獎助的培育博士生，她八年前在中正大學歷史研究所完成碩士論文「清代貞節的實踐及其困境」，論證貞節的實踐有「階級性」。她前年四月上網查資料，在國家圖書館網站上竟發現中研院林姓女助理的碩士論文「情慾與社會秩序：從刑科題本看清代婦女的抉擇」，有多處抄自她的碩士論文；且林女將論文改寫成單篇專文「賦性宣淫：清乾隆朝強姦案之解讀」，刊登在東吳大學歷史系研究生學報創刊號，也有多處抄襲她的碩士論文。張女說，</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/2296281359372819272/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/08/news.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2296281359372819272'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2296281359372819272'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/08/news.html' title='News: 論文抄別人 博士碩士都沒了'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-5368211743396584216</id><published>2010-07-29T23:40:00.006+08:00</published><updated>2010-10-08T16:37:20.780+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='J. Fridrich'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='books'/><category scheme='http://www.blogger.com/atom/ns#' term='dictionary'/><title type='text'>The purpose of steganography is to conceal the very presence of secret information.</title><summary type='text'>剛剛收到的 空中英語教室電子報 200 期, 內容剛好是在討論 very 的形容詞用法, 內容如下:The U.N.'s Law of the Sea Treaty aims to resolve this very question. (p. 50, line 2)句中的 very 是形容詞、比較不常見的用法，它有「正是」的強調意味。例句：-- The topic you brought up is the very thing we discussed at our last meeting.-- Barbara realized that her children had done the very thing she feared: they had all moved far from home.在我的印象中, 我所讀的 steganography papers 中, </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/5368211743396584216/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/07/purpose-of-steganography-is-to-conceal.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5368211743396584216'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5368211743396584216'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/07/purpose-of-steganography-is-to-conceal.html' title='The purpose of steganography is to conceal the very presence of secret information.'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-8715593659527031319</id><published>2010-07-28T20:53:00.003+08:00</published><updated>2010-07-28T21:03:44.520+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='books'/><title type='text'>I have received the steganography book!</title><summary type='text'>今天下午, 在 Book Depository 訂購的書, 已經從英國(U.K.) 寄到家裏(Taiwan)了,  剛好花了一個星期的時間! 　　全球免運費(Free delivery worldwide)的情況下, 還可以在一個星期內拿到書, Book Depository 真的是不簡單!這本書的封面設計的很不錯! (July 28, 2010)</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/8715593659527031319/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/07/i-have-received-steganography-book.html#comment-form' title='1 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8715593659527031319'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8715593659527031319'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/07/i-have-received-steganography-book.html' title='I have received the steganography book!'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><media:thumbnail xmlns:media='http://search.yahoo.com/mrss/' url='http://lh4.ggpht.com/_dAircxyIh00/TE_xft9K0DI/AAAAAAAAFTk/lUCRvpBY-Xg/s72-c/BookDepository-20100728-01.jpg' height='72' width='72'/><thr:total>1</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6116060008432268439</id><published>2010-07-21T20:12:00.011+08:00</published><updated>2010-09-02T12:54:18.669+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='books'/><title type='text'>Book: Steganography in Digital Media</title><summary type='text'>前幾天在 博客來網路書店 用關鍵字 steganography 搜尋, 竟然讓我找到這本 Jessica Fridrich 在去年底發表的新書, 看了實在很心動, 但原價 85 美元的書, 竟然定價為 3825 元, 匯率竟然是用 45 元計價, 實在是賣得太貴了!接著, 我就到 金石堂網路書局 去找同樣一本書, 結果金石堂更誇張, 賣 4760 元, 匯率竟高達 56 元。或許這兩家書局還要負擔從國外寄書進口的運費, 我們就從 Amazon 網路書局來比較一下好了。這本書在 Amazon 的定價(List Price) 為 85 美元, 實際售價(Price) 為 68 美元, 這本書在美國為 FREE with Super Saver Shipping 免運費, 寄到台灣則是要加上約 10 美元的運費 (Per Shipment 4.99 + Per Item 4.99), 直接從 </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6116060008432268439/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/07/book-steganography-in-digital-media.html#comment-form' title='1 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6116060008432268439'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6116060008432268439'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/07/book-steganography-in-digital-media.html' title='Book: Steganography in Digital Media'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>1</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-1083159417670218741</id><published>2010-05-29T00:52:00.005+08:00</published><updated>2010-05-29T08:23:53.211+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 學生論文抄襲 教授升聘受阻</title><summary type='text'>(中央社 2010/05/26 記者李先鳳台南電)教育部高教司長何卓飛今天表示，由於網路便利性，近年學術論文抄襲案件增多；為遏止弊端，擬於 9 月起，若學生碩博士論文抄襲，指導教授的升等、聘任都會受影響。98 學年度全國公私立大學校院教務主管聯席會議今、明兩天在長榮大學舉行，主軸為「優質大學教師的第一課」，針對學術倫理、卓越教學及國際化等主題進行專題演講及經驗交流。行政院國科會科學教育處長胡志偉下午以「大學老師的第一課：行政院國科會學術倫理案件處理要點」為題演講表示，學術倫理中常見的不當行為有捏造、變造、剽竊，在台灣很多學生不知如何寫報告，可能是學校老師沒有教，於是就抄襲。教育部高教司長何卓飛表示，由於網路便利性，近年學術論文抄襲案件增多，98年至今已有15件檢舉案，其中7件確認抄襲、3 件審理中、5 件無抄襲之嫌。何卓飛指出，碩博士生的論文是否涉及抄襲，指導教授是第1個把關者。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/1083159417670218741/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/05/news.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1083159417670218741'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1083159417670218741'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/05/news.html' title='News: 學生論文抄襲 教授升聘受阻'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-5853863428857719991</id><published>2010-02-05T11:48:00.010+08:00</published><updated>2010-08-17T12:22:36.284+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='null cipher'/><category scheme='http://www.blogger.com/atom/ns#' term='G. Kessler'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><title type='text'>An Overview of Steganography for the Computer Forensics Examiner</title><summary type='text'>Gray C. Kessler,"An Overview of Steganography for the Computer Forensics Examiner,"Forensic Science Communications, Volume 6, Number 3AbstractSteganography is the art of covered or hidden writing. The purpose of steganography is covert communication - to hide the existence of a message from a third party. This paper is intended as a high-level technical introduction to steganography for those </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/5853863428857719991/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/02/overview-of-steganography-for-computer.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5853863428857719991'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5853863428857719991'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/02/overview-of-steganography-for-computer.html' title='An Overview of Steganography for the Computer Forensics Examiner'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-660228238653764368</id><published>2010-02-01T18:08:00.005+08:00</published><updated>2010-02-04T13:17:56.147+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><category scheme='http://www.blogger.com/atom/ns#' term='911'/><title type='text'>News: 白宮發言人: 911 恐怖攻擊主謀可能會處決</title><summary type='text'>（路透華盛頓 31 日電 中央社 翻譯, 原始新聞連結）白宮發言人吉布茲（Robert Gibbs）今天表示，被控策劃 911 恐怖攻擊事件的穆罕默德（Khalid Sheikh Mohammed），將遭審訊、定罪，並可能處決。吉布茲在美國有線電視新聞網（CNN）「美國國情（State of the Union）」談話節目中說：「穆罕默德將被問審，並去見上帝。他會送交審判，並可能為他所犯下的滔天大罪遭行刑處死。」基於起訴 911 事件一干被告，維安與相關費用所費不貲，有報導稱，為此面臨強烈抨擊的歐巴馬政府，已開始尋找紐約以外的其他地點，以起訴穆罕默德和另 4 名共謀被告。對於這些報導，吉布茲並未證實。Khalid Sheikh Mohammed</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/660228238653764368/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2010/02/news-911.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/660228238653764368'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/660228238653764368'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2010/02/news-911.html' title='News: 白宮發言人: 911 恐怖攻擊主謀可能會處決'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-1117358445970370887</id><published>2009-12-06T18:36:00.005+08:00</published><updated>2009-12-06T21:46:28.148+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Y.-K. Lee'/><category scheme='http://www.blogger.com/atom/ns#' term='PSIVT 2009'/><title type='text'>My presentation at PSIVT 2009</title><summary type='text'>An Advanced Least-Significant-Bit Embedding Scheme for Steganographic EncodingYeuan-Kuen Lee, Graeme Bell, Shih-Yu Huang,Ran-Zan Wang and Shyong Jian ShyuThe 3rd Pacific-Rim Symposium on Image and Video Technology ( PSIVT 2009 )Tokyo, Japan, January 13th - 16th, 2009Official Website: http://psivt2009.nii.ac.jp/Presentation PPT　</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/1117358445970370887/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/12/my-presentation-at-psivt-2009.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1117358445970370887'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1117358445970370887'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/12/my-presentation-at-psivt-2009.html' title='My presentation at PSIVT 2009'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><media:thumbnail xmlns:media='http://search.yahoo.com/mrss/' url='http://lh6.ggpht.com/_dAircxyIh00/SXfrKhr4dsI/AAAAAAAAB9A/B-_rimZq9Ao/s72-c/20090115-PSIVT2009-10.jpg' height='72' width='72'/><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-1135938534767002920</id><published>2009-10-07T09:57:00.027+08:00</published><updated>2009-10-23T23:54:03.224+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='A. Gutub'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='Arabic text steganography'/><title type='text'>Arabic Text Staganography Using Multiple Diacritics</title><summary type='text'>Adnan A. Gutub, Yousef S. Elarian, Sameh M. Awaideh and Aleem K. Alvi, 'Arabic Text Staganography Using Multiple Diacritics,' 2008 5th IEEE International Workshop on Signal Processing and Its Applications (WoSPA 2008), 18-20 March 2008, University of Sharjah, Sharjah, United Arab Emirates. [ PDF ]AbstractSteganography techniques are concerned with hiding the existence of data in other cover media</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/1135938534767002920/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/10/arabic-text-staganography-using.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1135938534767002920'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1135938534767002920'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/10/arabic-text-staganography-using.html' title='Arabic Text Staganography Using Multiple Diacritics'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6710468768358855243</id><published>2009-09-28T10:23:00.020+08:00</published><updated>2009-10-07T02:25:08.906+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='A. Gutub'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='Arabic text steganography'/><title type='text'>Arabic Diacritics Based Steganography</title><summary type='text'>Mohammed A. Aabed, Sameh M. Awaideh, Abdul-Rahman M. Elshafei and Adnan A. Gutub, 'Arabic Diacritics Based Steganography,' 2007 IEEE International Conference on Signal Processing and Communications (ICSPC 2007), 24-27 November 2007, Dubai, United Arab Emirates. [ PDF ]AbstractNew steganography methods are being proposed to embed secret information into text cover media in order to search for new </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6710468768358855243/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/09/arabic-diacritics-based-steganography.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6710468768358855243'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6710468768358855243'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/09/arabic-diacritics-based-steganography.html' title='Arabic Diacritics Based Steganography'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-5267302821489924095</id><published>2009-09-23T08:54:00.010+08:00</published><updated>2009-09-26T17:42:26.122+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='A. Gutub'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='Arabic text steganography'/><title type='text'>A Novel Arabic Text Steganography Method Using Letter Points and Extensions</title><summary type='text'>Adnan A. Gutub and Manal M. Fattani, 'A Novel Arabic Text Steganography Method Using Letter Points and Extensions,' WASET International Conference on Computer, Information and Systems Science and Engineering (ICCISSE 2007), 25-27 May 2007, Vienna, Austria. [ PDF ]AbstractThis paper presents a new steganography approach suitable for Arabic texts. It can be classified under steganography feature </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/5267302821489924095/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/09/novel-arabic-text-steganography-method.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5267302821489924095'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5267302821489924095'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/09/novel-arabic-text-steganography-method.html' title='A Novel Arabic Text Steganography Method Using Letter Points and Extensions'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6000277842173001197</id><published>2009-09-21T21:52:00.018+08:00</published><updated>2009-10-24T00:49:33.918+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='A. Gutub'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='Arabic text steganography'/><title type='text'>About Arabic Text Steganography (1)</title><summary type='text'> Prof. Adnan Abdul-Aziz Gutub 是沙烏地阿拉伯(Saudi Arabia) 法德國王石油與礦物大學(King Fahd University of Petroleum and Minerals) 電腦工程學系(Computer Engineering Department) 的主席。最近連續研讀了四篇 Prof. Adnan Abdul-Aziz Gutub 所發表的研討會論文, 論文主軸都是圍繞在 Arabic Text Steganography, 也就是將機密訊息藏在 Arabic Text 檔案之中, 希望達到秘密通訊的目的。這四篇論文分別如下:1. Adnan A. Gutub and Manal M. Fattani,'A Novel Arabic Text Steganography Method Using Letter Points and </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6000277842173001197/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/09/about-arabic-text-steganography.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6000277842173001197'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6000277842173001197'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/09/about-arabic-text-steganography.html' title='About Arabic Text Steganography (1)'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6141417193627957909</id><published>2009-09-12T17:44:00.001+08:00</published><updated>2009-09-12T17:46:33.156+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Alan Turing'/><category scheme='http://www.blogger.com/atom/ns#' term='news'/><category scheme='http://www.blogger.com/atom/ns#' term='code-breaker'/><title type='text'>News: Gordon Brown: I'm proud to say sorry to a real war hero</title><summary type='text'>Gordon Brown: I'm proud to say sorry to a real war heroThe treatment of code-breaker Alan Turing was utterly unfair, says Gordon BrownBy Gordon BrownPublished: 9:30PM BST 10 Sep 2009Original LinkThis has been a year of deep reflection – a chance for Britain, as a nation, to commemorate the profound debts we owe to those who came before. A unique combination of anniversaries and events have </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6141417193627957909/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/09/news-gordon-brown-im-proud-to-say-sorry.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6141417193627957909'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6141417193627957909'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/09/news-gordon-brown-im-proud-to-say-sorry.html' title='News: Gordon Brown: I&apos;m proud to say sorry to a real war hero'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-4678738266059158933</id><published>2009-05-06T15:44:00.012+08:00</published><updated>2011-11-14T19:08:51.758+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Huffman coding'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Entropy-Coded Segment (ECS) in Rex.jpg</title><summary type='text'>Rex.jpg 影像中的第一個 Entropy-coded segment (ECS) 是出現在 Rex.pdf 文件 page: 24 的 0000373eh ～ 00003826h, 從 F9 85 ... 一直到 49 7F, 一共有 233 個 Bytes.從 page:23 00003586h 的 DRI Segment, 我們可以得知一個 ECS 中包含了 15 個 MCUs (minimum coded unit), 每一個 MCU 則分別包含一個 8*8 的 Y 亮度區塊, 一個 Cb 色差區塊, 一個 Cr 色差區塊。因此, 這個 233 位元長的 ECS 區段總共包含了 45 個 8*8 的 DCT 係數區塊。使用  Rex-HuffmanTable.pdf 的 4 個 Huffman Tables, 我們可以將第一個 ECS 還原成  DCT 係數, 詳細的還原過程</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/4678738266059158933/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/05/entropy-coded-segment-ecs-in-rexjpg.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4678738266059158933'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4678738266059158933'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/05/entropy-coded-segment-ecs-in-rexjpg.html' title='Entropy-Coded Segment (ECS) in Rex.jpg'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-5880871195576950119</id><published>2009-04-27T19:27:00.001+08:00</published><updated>2009-04-27T19:33:23.022+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>DCT Coefficients in Rex.jpg</title><summary type='text'>我將 Rex.jpg 解壓縮後, 所得到的 DCT 係數, 存放在 Rex-DCT Coefficients.xls 中, 給大家在寫解壓縮程式時, 可以做比對之用。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/5880871195576950119/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/04/dct-coefficients-in-rexjpg.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5880871195576950119'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5880871195576950119'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/04/dct-coefficients-in-rexjpg.html' title='DCT Coefficients in Rex.jpg'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6674043667210179117</id><published>2009-04-09T22:27:00.005+08:00</published><updated>2009-04-11T14:56:04.688+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Huffman coding'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Huffman Table in the Rex.jpg</title><summary type='text'>使用 UltraEdit 將 Rex.jpg 檔以 16 進位表示法開啟, 可以得到 Rex.pdf 這份文件。在文件 Page: 23 的 0000358ch 位址上, 可以找到 X'FFDC marker, 整個 DHT (Define Huffman Table(s)) Segment 一直延續到 Page:24 的 0000372f h 結束。DHT Segment 一共存放了 4 個 Huffman Tables, 使用 Huffman Table Generating Procedure 可以將 DHT Segment 轉換成 Rex-HuffmanTable.pdf 的 4 個 Huffman Tables。　</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6674043667210179117/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/04/huffman-table-in-rexjpg.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6674043667210179117'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6674043667210179117'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/04/huffman-table-in-rexjpg.html' title='Huffman Table in the Rex.jpg'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-3787560876616914692</id><published>2009-03-08T23:32:00.004+08:00</published><updated>2009-03-09T01:32:11.187+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: Funding concentrated on elite might be a mistake</title><summary type='text'>英調查發現 研究經費集中撥給精英大學恐是不智之舉國科會 國際科技合作 簡訊網原始文件連結作者：駐英科技組　現職：駐英科技組文章來源：Times Higher Education, 15-21 Jan., 2009, No. 1879發佈時間：98.02.26英國華威大學經濟學家及教授 Andrew Oswald 在近期調查報告中建議，未來研究經費應廣泛地分撥給各大學，避免集中於少數傳統精英大學之上。這份分析報告與最近英國高等教育評鑑（Research Assessment Exercise, RAE）的調查結果不謀而合，發現出產「世界級」研究並非少數以研究知名的精英大學之專利。這份調查報告以經濟學學科領域為對象，分析 2001 到 2008 年間世界各大學所發表的經濟學研究報告，歸納出 450 篇得列「世界等級」之報告，這幾篇報告不僅曾先後發表於二十二份世界頂尖期刊雜誌，</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/3787560876616914692/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/03/news.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/3787560876616914692'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/3787560876616914692'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/03/news.html' title='News: Funding concentrated on elite might be a mistake'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6429204127161237796</id><published>2009-01-22T12:57:00.010+08:00</published><updated>2009-10-15T10:26:41.291+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Y.-K. Lee'/><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><category scheme='http://www.blogger.com/atom/ns#' term='PSIVT 2009'/><title type='text'>PSIVT 2009</title><summary type='text'>2009/1/15PSIVT 2009 是在日本東京的國家科學中心(National Center of Sciences) 舉行。到此一遊 !Prof. Shih-Yu HuangProf. Graeme Bell我們這篇 paper "An Advanced Least-Significant-Bit Embedding Scheme for Steganographic Encoding" 的三位主要作者都來了, 將由我上台報告論文。這張照片是銘傳大學與中華大學教授的合照,最右邊就是中華大學資工系李建興教授, 我和李建興教授是同一個實驗室畢業的, 所以這一次就一起來到東京！謝朝和教授和其夫人...Springer 的攤位這兩位這次都不用上台報告論文, 所以一派輕鬆 ...Room A 就是我要上台報告的地方, 比一般研討會大很多, ...Dr. Cees Snoke 是大會 </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6429204127161237796/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2009/01/psivt-2009_22.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6429204127161237796'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6429204127161237796'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2009/01/psivt-2009_22.html' title='PSIVT 2009'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><media:thumbnail xmlns:media='http://search.yahoo.com/mrss/' url='http://lh4.ggpht.com/_dAircxyIh00/SXYPFq4DZ6I/AAAAAAAAB60/Rive62pHn9I/s72-c/20090115-PSIVT2009-01.jpg' height='72' width='72'/><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7370196917208678337</id><published>2008-12-18T11:13:00.005+08:00</published><updated>2008-12-18T11:40:12.509+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: Terrorist instructions hidden online</title><summary type='text'>2001/02/05 Jack Kelley 接連在《 USA Today 》發表兩篇報導, 指出美國官方及專家認為賓拉登及其組織可能透過將恐怖攻擊計畫藏在色情網站的圖片之中，或是運動聊天室來傳遞攻擊指令。原始新聞連結 / Original LinkTerror groups hide behind Web encryption02/05/2001 - Updated 05:17 PM ETBy Jack KelleyWASHINGTON — Hidden in the X-rated pictures on several pornographic Web sites and the posted comments on sports chat rooms may lie the encrypted blueprints of the next terrorist attack </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7370196917208678337/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/12/news-terrorist-instructions-hidden.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7370196917208678337'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7370196917208678337'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/12/news-terrorist-instructions-hidden.html' title='News: Terrorist instructions hidden online'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6938884793251688829</id><published>2008-12-14T16:12:00.013+08:00</published><updated>2008-12-15T12:47:31.396+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Provos'/><title type='text'>Defending Against Statistical Steganalysis (part 3)</title><summary type='text'>本篇文章延續 part 2 的討論, 將焦點鎖定在 Section 7 Analysis, 一篇完整的論文, 一定要從各方面去分析所提出的方法, 是否禁得起各方面的考驗。作者首先交代實驗的影像來源為何? To evaluate our correction algorithm, we embedded data into 54 pictures taken with a Fuji MX-1700 digital camera around Ann, Arbor, Michigan. The sizes of images is 640*480 pixels.將照片從數位相機下載到電腦後, 作者設定壓縮品質參數為 75, 將影像重新壓縮, 用來模擬沒有嵌入任何機密訊息的影像。這組影像中, 可用來嵌入機密訊息的 DCT 係數, 平均為 46,000 個, 最低為 30,000 個, 最高為 </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6938884793251688829/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/12/defending-against-statistical_14.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6938884793251688829'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6938884793251688829'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/12/defending-against-statistical_14.html' title='Defending Against Statistical Steganalysis (part 3)'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6338867744001755452</id><published>2008-12-04T09:52:00.040+08:00</published><updated>2008-12-28T21:42:28.072+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='OutGuess'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Provos'/><title type='text'>Defending Against Statistical Steganalysis (part 2)</title><summary type='text'>本篇文章延續 part 1 的討論, 將焦點鎖定在 Section 6 Correcting Statistical Deviations, 探討 OutGuess 0.2 是如何做到將掩護影像(cover-images) 的直方圖特性保留在偽裝影像(stego-images) 之中。從 part 1 的討論, 我們知道 OutGuess 0.2 並沒有把所有的冗餘位元(redundant bits) 都拿來作為機密訊息嵌入之用。在 Selection process 中, 最多只允許一半的冗餘位元放置機密訊息。隱藏學這個研究領域有一項要特別注意的就是: 通常我們並不知道將來對手會用什麼的統計測試(statistical tests) 來偵測機密訊息是否被嵌入到媒體之中。假設我們已經知道一些特定的攻擊手法, 自然就可以事先防範, 同樣用一些冗餘位元來將這些因為嵌入動作而產生的統計偏差(</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6338867744001755452/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/12/defending-against-statistical.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6338867744001755452'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6338867744001755452'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/12/defending-against-statistical.html' title='Defending Against Statistical Steganalysis (part 2)'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-931565041602979106</id><published>2008-11-01T14:09:00.011+08:00</published><updated>2010-12-25T19:07:06.862+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='A. Westfeld'/><category scheme='http://www.blogger.com/atom/ns#' term='IHW 2002'/><category scheme='http://www.blogger.com/atom/ns#' term='steganalysis'/><category scheme='http://www.blogger.com/atom/ns#' term='MP3Stego'/><category scheme='http://www.blogger.com/atom/ns#' term='Chi-Square attack'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='Hide'/><title type='text'>Detecting Low Embedding Rates</title><summary type='text'>Author: Andreas WestfeldInformation Hiding Workshop 2002 (IHW 2002)Noordwijkerhout, The Netherlands, 7–9 October 2002Springer-Verlag Berlin Heidelberg,LNCS 2578, pp. 324–339, 2003.AbstractThis paper shows three approaches for detecting steganograms with low change density. MP3Stego is a steganographic algorithm with a very low embedding rate. The attack presented here is a statistical analysis of</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/931565041602979106/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/11/detecting-low-embedding-rates.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/931565041602979106'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/931565041602979106'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/11/detecting-low-embedding-rates.html' title='Detecting Low Embedding Rates'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><media:thumbnail xmlns:media='http://search.yahoo.com/mrss/' url='http://lh6.ggpht.com/_dAircxyIh00/TRW9dNo88sI/AAAAAAAAF3I/xVjty0T2bIQ/s72-c/20101225-Starbucks-01.jpg' height='72' width='72'/><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-4565257700505479328</id><published>2008-10-27T10:29:00.012+08:00</published><updated>2009-01-12T23:38:11.611+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Y.-K. Lee'/><category scheme='http://www.blogger.com/atom/ns#' term='PSIVT 2009'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><title type='text'>An Advanced Least-Significant-Bit Embedding Scheme for Steganographic Encoding</title><summary type='text'>Authors: Yeuan-Kuen Lee, Graeme Bell, Shih-Yu Huang, Ran-Zan Wang and Shyong Jian ShyuThe 3rd Pacific-Rim Symposium on Image and Video Technology ( PSIVT 2009 )Tokyo, Japan, January 13th - 16th, 2009Official Website: http://psivt2009.nii.ac.jp/AbstractThe advantages of Least-Significant-Bit (LSB) steganographic data embedding are that it is simple to understand, easy to implement, and it results </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/4565257700505479328/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/10/advanced-least-significant-bit.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4565257700505479328'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4565257700505479328'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/10/advanced-least-significant-bit.html' title='An Advanced Least-Significant-Bit Embedding Scheme for Steganographic Encoding'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7023154725737490910</id><published>2008-10-06T00:41:00.002+08:00</published><updated>2008-10-06T00:46:17.573+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='PSIVT 2009'/><title type='text'>Message from PSIVT 2009</title><summary type='text'>10月3日終於接到來自 PSIVT 2009 的消息, 接受了我們投稿的論文。可以開始著手準備前往東京了。Dear Yeuan-Kuen Lee,We wish to congratulate you on the acceptance of your submission with paper ID: 154 as an oral presentation in the PSIVT2009 program. Review comments for your paper are now available in the papers management system: https://cmt.research.microsoft.com/PSIVT2009.The camera-ready paper deadline is on 17 October 2008, and paper </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7023154725737490910/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/10/message-from-psivt-2009.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7023154725737490910'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7023154725737490910'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/10/message-from-psivt-2009.html' title='Message from PSIVT 2009'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-788983818688893766</id><published>2008-09-24T16:56:00.026+08:00</published><updated>2008-09-25T00:37:28.857+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='statistics'/><category scheme='http://www.blogger.com/atom/ns#' term='books'/><category scheme='http://www.blogger.com/atom/ns#' term='dictionary'/><title type='text'>Bivariate Distribution &amp; Marginal Distribution</title><summary type='text'>Bivariate Distribution 顧名思義就是具有兩個隨機變數的分配。在 貓頭鷹出版社 所出版的 統計學辭典 中, 舉的例子非常容易理解: 特定構造與型示的二手車。一般來說, 對有興趣的買主來說, 二手汽車有兩個令人感興趣且容易測量的變數: 車齡 和 里程數。假設有一家二手車行購進了同一樣式的二手車 30 輛, 車行就可以將其依車子的使用年齡和行駛里程數製成一個二變量次數表。換句話說, 就是列出一個二維表格, 一維是車齡, 另一維是里程數, 表中統計符合條件的車輛數。例如: 使用 2-3 年, 行駛 4-5 萬英里的車子有 2 輛。在這個例子中, 兩個變數並不是相互獨立的, 較舊的車通常行駛較長的距離。　如果表中所使用的是機率, 那就是一個 二變量機率分布 (bivariate probability distribution), 在二變量分配表上, 分別做行相加, </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/788983818688893766/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/09/bivariate-distribution.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/788983818688893766'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/788983818688893766'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/09/bivariate-distribution.html' title='Bivariate Distribution &amp; Marginal Distribution'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6146863761793047109</id><published>2008-09-23T00:39:00.014+08:00</published><updated>2012-01-16T14:00:43.268+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='F5'/><category scheme='http://www.blogger.com/atom/ns#' term='OutGuess'/><category scheme='http://www.blogger.com/atom/ns#' term='J. Fridrich'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='JPEG steganalysis'/><category scheme='http://www.blogger.com/atom/ns#' term='IHW 2004'/><title type='text'>Feature-Based Steganalysis for JPEG Images and Its Implications for Future Design of Steganographic Schemes</title><summary type='text'>Author: Jessica FridrichInformation Hiding Workshop 2004Toronto, Ontario, Canada23 - 25, May, 2004Lecture Notes in Computer Science, Vol. 3200AbstractIn this paper, we introduce a new feature-based steganalytic method for JPEG images and use it as a benchmark for comparing JPEG steganographic algorithms and evaluating their embedding mechanisms. The detection method is a linear classifier trained</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6146863761793047109/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/09/feature-based-steganalysis-for-jpeg.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6146863761793047109'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6146863761793047109'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/09/feature-based-steganalysis-for-jpeg.html' title='Feature-Based Steganalysis for JPEG Images and Its Implications for Future Design of Steganographic Schemes'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-5158020200869807660</id><published>2008-09-08T09:39:00.003+08:00</published><updated>2008-09-08T13:12:49.100+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='WCE 2008'/><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><title type='text'>WCE 2008</title><summary type='text'>2008/07/02World Congress on Engineering (WCE) 每年都在 Imperial College, London 舉辦, 底下聯合了 15 個不同領域的研討會, 今年我們一行人投稿了兩篇論文, 一篇屬於 ICISIE'08, 由元智資工系王任瓚教授在 07/02 早上場次報告; 另一篇則是屬於 ICSIE'08, 由黃世育教授在 07/02 下午場次報告。Imperial College, London　Imperial College, London很幸運地, 出了地鐵站, 就遇見了已經在 WCE 2008 奮鬥了一個早上的三位教授。王任瓚教授已經報告完了, 所以一臉輕鬆。進入會場後, 我們先找個合適的地方留影, 　(left to right) Prof. Ran-Zan Wang, Prof. Shih-Yu Huang, Prof. </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/5158020200869807660/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/09/20080702-world-congress-on-engineering.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5158020200869807660'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5158020200869807660'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/09/20080702-world-congress-on-engineering.html' title='WCE 2008'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><media:thumbnail xmlns:media='http://search.yahoo.com/mrss/' url='http://lh4.ggpht.com/YeuanKuenLee/SL54_EnlQlI/AAAAAAAAA0c/thaI7-epLrk/s72-c/20080702-WCE2008-01.jpg' height='72' width='72'/><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-8565131607437362418</id><published>2008-08-31T23:04:00.014+08:00</published><updated>2010-12-22T18:11:11.324+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='T. Sharp'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='Hide'/><category scheme='http://www.blogger.com/atom/ns#' term='IHW 2001'/><title type='text'>An Implementation of Key-Based Digital Signal Steganography</title><summary type='text'> Author: Toby SharpInformation Hiding Workshop 2001Pittsburgh, PA, USA, April 25–27, 2001Spring LNCS 2137, pp. 13-26, 2001AbstractA real-life requirement motivated this case study of secure covert communication. An independently researched process is described in detail with an emphasis on implementation issues regarding digital images. A scheme using stego keys to create pseudorandom sample </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/8565131607437362418/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/08/implementation-of-key-based-digital.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8565131607437362418'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8565131607437362418'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/08/implementation-of-key-based-digital.html' title='An Implementation of Key-Based Digital Signal Steganography'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-2295075016071373119</id><published>2008-08-11T23:33:00.007+08:00</published><updated>2012-01-16T17:45:45.180+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>Steganography in Cuil</title><summary type='text'>今天在 天下知識網 的 Podcasting 聽到一篇文章 "為什麼全世界媒體都在報導這個網站？" 原來在介紹一個新的搜尋引擎 Cuil,...我特地搜尋了 steganography 這個關鍵字, 搜尋結果的頁面排版還包含相關圖片, 感覺還真的不錯。仔細看搜尋結果, 包含的範圍似乎還蠻廣的, 各代表類型都有, 大家可以去試試看。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/2295075016071373119/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/08/steganography-in-cuil.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2295075016071373119'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2295075016071373119'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/08/steganography-in-cuil.html' title='Steganography in Cuil'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-1231940553345216212</id><published>2008-08-03T18:35:00.008+08:00</published><updated>2008-08-06T17:46:33.808+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='LaTeX'/><category scheme='http://www.blogger.com/atom/ns#' term='writing'/><title type='text'>LaTeX</title><summary type='text'>由於 PSIVT 2009 並不鼓勵使用 MS Word 排版論文投稿, 因此我們開始準備將論文用 LaTeX 來編輯。雖然, 自己還在當博士生的時代, 曾經用 LaTex 寫過論文, 不過至少也是 6 年多前的陳年舊事了。以前用的系統, 早就老舊不堪, 也換了電腦。因此, 兩天前我開始在網路上搜尋, 準備重新建立 LaTex 的論文編輯環境。最早搜尋到的一篇正體中文文章是我們互動媒體實驗室的新成員 小葉老師 在博士生時代 (2003) 所寫的 LaTeX 快速入門教學, 小葉老師推薦 WinShell + MiKTeX, 因此, 問題解決了一半, 直接上網搜尋這兩個套裝軟體的相關訊息, 開始研究。以下是一些會使用到的相關軟體的網站:MiKTeX is an up-to-date TeX implementation for the Windows operating system...</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/1231940553345216212/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/08/latex.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1231940553345216212'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1231940553345216212'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/08/latex.html' title='LaTeX'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-4230192232149574535</id><published>2008-08-03T16:27:00.008+08:00</published><updated>2008-10-06T00:46:30.904+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><category scheme='http://www.blogger.com/atom/ns#' term='PSIVT 2009'/><title type='text'>PSIVT 2009: The 3rd Pacific-Rim Symposium on Image and Video Technology 2009</title><summary type='text'>The 3rd Pacific-Rim Symposium on Image and Video Technology 2009Tokyo, Japan, January 13th - 16th, 2009Official Website: http://psivt2009.nii.ac.jp/PSIVT 2009 is the continuation of a series of successful events in Hsinchu, Taiwan in 2006 and Santiago, Chile in 2007.The symposium provides a forum for presenting and exploring the newest research and development in image and video technology by </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/4230192232149574535/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/08/psivt-2009-3rd-pacific-rim-symposium-on.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4230192232149574535'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4230192232149574535'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/08/psivt-2009-3rd-pacific-rim-symposium-on.html' title='PSIVT 2009: The 3rd Pacific-Rim Symposium on Image and Video Technology 2009'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-1080513490932681011</id><published>2008-03-30T12:30:00.055+08:00</published><updated>2008-12-28T19:06:32.836+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='OutGuess'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Provos'/><title type='text'>Defending Against Statistical Steganalysis (part 1)</title><summary type='text'>N. Provos 在 10th USENIX Security Symposium, August 13-17, 2001 發表了 "Defending Against Statistical Steganalysis" 這篇論文, 內容就是闡述 OutGuess 0.2 這個隱藏軟體是如何運作的。本篇文章所要討論的主軸是論文中有關 OutGuess 核心技術的部分 - Section 3 。Section 3 Embedding Process作者將 embedding Process 切割成兩個獨立的步驟:1. Identification of redundant bits.Redundant bits can be modified without detectably degrading the cover medium.作者指出所謂的冗餘位元(redundant bits)</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/1080513490932681011/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/03/about-outguess-02-1.html#comment-form' title='2 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1080513490932681011'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1080513490932681011'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/03/about-outguess-02-1.html' title='Defending Against Statistical Steganalysis (part 1)'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>2</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-4820828129497567211</id><published>2008-03-19T08:30:00.008+08:00</published><updated>2010-07-02T17:40:18.596+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><category scheme='http://www.blogger.com/atom/ns#' term='dictionary'/><title type='text'>The Difference between Conference and Workshop</title><summary type='text'>昨天上課在討論時, 研究生問我 conference 和 workshop 有什麼不同? 我記得前幾個禮拜曾經在空中英語教室 chatroom 聽過這麼一段討論, 於是就把檔案找出來一起聽聽看。剛剛想到和黃世育老師規劃非資訊學院科系大二多媒體課程時, 有納入音訊檔的簡單處理, 黃老師建議使用 GoldWave , 於是就上網搜尋這個軟體下載, 想要把 chatroom 這一段單獨剪輯成一個檔案, 放在這邊給研究生分享。　</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/4820828129497567211/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/03/difference.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4820828129497567211'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4820828129497567211'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/03/difference.html' title='The Difference between Conference and Workshop'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-9049783684806156237</id><published>2008-03-16T12:44:00.007+08:00</published><updated>2008-03-16T12:56:52.683+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><category scheme='http://www.blogger.com/atom/ns#' term='IHW 2008'/><title type='text'>IHW 2008: Information Hiding Workshop 2008</title><summary type='text'>Information Hiding Workshop 2008Santa Barbara, California, USA,May 19-21, 2008For many years, information hiding has captured the imagination of researchers. Digital watermarking and steganography tools are used to address digital rights management, protect information, and conceal secrets. From an investigators perspective, information hiding provides an interesting challenge for digital </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/9049783684806156237/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/03/ihw-2008-information-hiding-workshop.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/9049783684806156237'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/9049783684806156237'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/03/ihw-2008-information-hiding-workshop.html' title='IHW 2008: Information Hiding Workshop 2008'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-301661190916548806</id><published>2008-03-15T14:30:00.005+08:00</published><updated>2008-03-15T15:15:05.529+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='ISC 2008'/><title type='text'>EDAS Conference Management System</title><summary type='text'>要投稿到 ISC 2008, 必須透過 EDAS Conference Management System, 換句話說, 我們必須要先到 EDAS 註冊, 取得帳號後, 才能投稿論文。這兩天, 使用 EDAS 的感覺還不錯, 投稿時, 要求論文初稿上不能有作者的相關資料, 以維護審稿的公正性, 因此每一個作者也都必須要有 EDAS 帳號, 然後再用新增作者的功能加上去。有許多研討會都是透過 EDAS 來投稿論文, 我上星期剛接觸到 EDAS 時, 在 EDAS 的網站看到許多可以投稿的研討會相關資訊, 那時候我就覺得透過這個系統中 Submit paper 功能, 看到原本分散在各處的研討會訊息被整合起來, 對每年都要參加研討會的學者來說, 應該是很不錯的管道。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/301661190916548806/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/03/edas-conference-management-system.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/301661190916548806'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/301661190916548806'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/03/edas-conference-management-system.html' title='EDAS Conference Management System'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-8439711228840077652</id><published>2008-03-11T18:19:00.003+08:00</published><updated>2008-03-11T18:25:29.307+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><category scheme='http://www.blogger.com/atom/ns#' term='ISC 2008'/><title type='text'>Message from ISC 2008</title><summary type='text'>今天中午收到來自 ISC 2008 的 mail, 說明目前投稿狀況, 台灣只有 8 篇, 真的是有點少, 希望大家多多投稿到 ISC 2008,...收到的 mail 如下:各位好,TWISC 與資訊安全學會將於九月主辦第十一屆 Information Security Conference 國際會議，李德財所長擔任會議之 General Chair，論文集列入 LNCS，目前投稿情形有五十六篇，其中就日本投了超過十七篇，我們主辦國卻只有八篇投稿，截稿日期到 3/15 日截止，會議網站請參考：http://isc08.twisc.org/ 若各位目前手頭有稿件，祈請踴躍投稿。PS：依學術慣例，LNCS 接受之論文，若有進行 Major revision，也可再轉投 journal。倘若論文（初稿）沒有被接受，Reviewer 的意見，也將對未來論文修改有許多助益。吳宗成 敬上</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/8439711228840077652/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/03/message-from-isc-2008.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8439711228840077652'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8439711228840077652'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/03/message-from-isc-2008.html' title='Message from ISC 2008'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7165941841675516736</id><published>2008-03-06T10:16:00.009+08:00</published><updated>2008-03-06T20:50:30.475+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><category scheme='http://www.blogger.com/atom/ns#' term='ISC 2008'/><title type='text'>ISC08: Information Security Conference 2008</title><summary type='text'>September 15-18, 2008Taipei, TaiwanWebsite http://isc08.twisc.org/index.htmlInformation Security 每年一度的盛事, 今年剛好在台灣舉辦, 研討會的 Topics 包含了我們的研究領域 - Information Hiding, ( 另一個重要的國際研討會是 IHW, Information Hiding Workshop, 今年 May 19-21 在 Santa Barbara, California, USA 舉辦, 論文截稿日期是 February 2, 2008 早就已經 來不及了 )。今年 ISC 原本的 Submission Deadline 是 March 1, 2008, 我的論文原先的規劃是準備投稿到屬於 WCE 2008 的 ICISOIE 08 , 昨天其實已經將論文改成</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7165941841675516736/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2008/03/isc08-information-security-conference.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7165941841675516736'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7165941841675516736'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2008/03/isc08-information-security-conference.html' title='ISC08: Information Security Conference 2008'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6314314746059473170</id><published>2007-11-24T16:34:00.000+08:00</published><updated>2007-11-25T14:36:08.347+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Huffman coding'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Structure of AC code table</title><summary type='text'>在 JPEG 規格書 P. 89 談到了 AC code table 的結構。每一個非零的 AC 係數都是以一個 8-bit RS (Run/Size) 的形式來描述。　　RS = binary 'RRRRSSSS'4 個低位元 SSSS 定義非零的 AC 係數所屬的類別 (category), 分成 10 個類別, 可由 Table F.2 查到每個類別的範圍。高位元的 4 個 RRRR 則是指出非零 AC 係數之前存在多少個 0。由於有可能超過 15 個 0, 4-bit 的 RRRR 無法表示, 因此定義了 'RRRRSSSS' = X'F0' 來代表 15 個 0 外加一個值為 0 的 AC 係數, 換句話說, 共16個 0。除此, 如果在 Zigzag 序列中, 後面的 AC 係數已經全部為 0 了, 就用一個 EOB (end-of-block), 'RRRRSSSS'= '</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6314314746059473170/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/11/structure-of-ac-code-table.html#comment-form' title='1 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6314314746059473170'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6314314746059473170'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/11/structure-of-ac-code-table.html' title='Structure of AC code table'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>1</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-2363032868525187779</id><published>2007-11-24T14:52:00.000+08:00</published><updated>2007-11-24T15:54:24.889+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Huffman coding'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Huffman encoding procedures for DC coefficients</title><summary type='text'>在 JPEG 影像壓縮標準中, 對於 DC 係數的編碼, 霍夫曼編碼程序(Huffman encoding procedures) 使用了下列 2 個擴展表格(extended tables): 　　1) XHUFCO　　2) XHUFSI這兩個表格都是以相鄰兩個 block 區塊的差值(DIFF) 為索引, XHUFCO 存放 DIFF 所屬類別(category) 的 Huffman code, 再接上 為了區分 DIFF 在此類別中的位置的附加位元(additional bits)。XHUFSI 則是存放 DIFF 值所對應的 XHUFCO 表格中的位元長度, 即 Huffman code 長度加上附加位元的長度。XHUFCO 與 XHUFSI 這兩個表格則是由 Annex C, P. 52 所談到的 EHUFCO 與 EHUFSI 兩個表格加上附加位元擴展而來。有了 XHUFCO</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/2363032868525187779/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/11/huffman-encoding-procedures-for-dc.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2363032868525187779'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2363032868525187779'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/11/huffman-encoding-procedures-for-dc.html' title='Huffman encoding procedures for DC coefficients'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-1347522762652720278</id><published>2007-11-14T15:26:00.000+08:00</published><updated>2007-11-14T19:39:23.820+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Huffman coding'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Huffman decoding of DC coefficients</title><summary type='text'>由於以下兩個原因:1) DCT 的 DC 係數就是代表 8*8 區塊的像素平均值,2) 影像中相鄰區塊的像素平均值有很大的機率是相近的因此 JPEG 的 Huffman encoding procedure 並不是直接對 DC coefficients 編碼, 而是對兩個相鄰區塊的 DC difference 編碼。由於 difference 可能的值涵蓋太廣了, 對每一個可能值採取直接編碼的方式並不可行 (decoding tree 太大了), 因此 JPEG 採用的作法是先對所有可能值分成12個類別(category), 然後統計每一類別的機率, 有了機率後, 再依機率做 Huffman 編碼。JPEG 規格書 P.89 的 Table F.1 列出了 DC difference 是如何分類的Table F.1 Difference magnitude categories for </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/1347522762652720278/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/11/huffman-decoding-of-dc-coefficients.html#comment-form' title='2 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1347522762652720278'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1347522762652720278'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/11/huffman-decoding-of-dc-coefficients.html' title='Huffman decoding of DC coefficients'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>2</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7110325717051174468</id><published>2007-11-10T15:16:00.000+08:00</published><updated>2007-11-10T15:20:04.014+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Y'CbCr in JPEG Standard</title><summary type='text'>JPEG allows Y'CbCr where Y', Cb and Cr have the full 256 values:　JPEG-Y'CbCr (601) from "digital 8-bit R'G'B'  "　===========================================　Y' =       + 0.299    * R'd + 0.587    * G'd + 0.114    * B'd　Cb = 128   - 0.168736 * R'd - 0.331264 * G'd + 0.5      * B'd　Cr = 128   + 0.5      * R'd - 0.418688 * G'd - 0.081312 * B'd　===========================================　R'd, G'd, </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7110325717051174468/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/11/ycbcr-in-jpeg-standard.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7110325717051174468'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7110325717051174468'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/11/ycbcr-in-jpeg-standard.html' title='Y&apos;CbCr in JPEG Standard'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-8725797418768779638</id><published>2007-11-05T21:07:00.002+08:00</published><updated>2008-12-16T10:03:09.093+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='A. Latham'/><category scheme='http://www.blogger.com/atom/ns#' term='steganalysis'/><category scheme='http://www.blogger.com/atom/ns#' term='JPHide'/><category scheme='http://www.blogger.com/atom/ns#' term='Chi-Square attack'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Provos'/><title type='text'>關於 JPHide 的點點滴滴 (一) : N. Provos</title><summary type='text'>Niels Provos 在 "Detecting Steganographic Content on the Internet" 這篇論文的 Section 5.2 整節都在談論 JPHide 這個隱藏軟體。內文如下: 　JPHide is a steganographic system by Allan Latham. There are two versions: 0.3 and 0.5. Version 0.5 supports additional compression of the hidden message. As a result, they use slightly different headers to store embedding information. Before the content is embedded, it is Blowfish </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/8725797418768779638/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/11/jphide-n-provos.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8725797418768779638'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8725797418768779638'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/11/jphide-n-provos.html' title='關於 JPHide 的點點滴滴 (一) : N. Provos'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7438587413589610901</id><published>2007-11-04T16:29:00.001+08:00</published><updated>2008-10-27T10:33:46.741+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Jsteg-Shell'/><category scheme='http://www.blogger.com/atom/ns#' term='steganalysis'/><category scheme='http://www.blogger.com/atom/ns#' term='Chi-Square attack'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Provos'/><category scheme='http://www.blogger.com/atom/ns#' term='Jsteg'/><title type='text'>關於 Jsteg 的點點滴滴 (七) : N. Provos</title><summary type='text'>這張圖出現在 Niels Provos &amp; Peter Honeyman 的 2002年 ISOC NDSS'02 研討會論文 "Detecting Steganographic Content on the Internet" 中 ( Figure 4, P. 4 )。原文是這樣描述的:　Figure 4 shows the result of the X²-test for an image that contains information hidden with JSteg. In this case, the first chapter of “The Hunting of the Snark” has been bzip2 compressed prior to embedding. The low probability at the beginning of the </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7438587413589610901/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/11/jsteg-n-provos.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7438587413589610901'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7438587413589610901'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/11/jsteg-n-provos.html' title='關於 Jsteg 的點點滴滴 (七) : N. Provos'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6674746187899955583</id><published>2007-10-25T00:29:00.005+08:00</published><updated>2011-11-16T17:10:02.177+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Huffman coding'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Huffman Tree in the JPEG Decoder</title><summary type='text'>當我們在 JPEG 影像檔的檔頭遭遇 X'FFC4' marker, 並且將 Huffman Table 產生出來後, 必須進一步建立 Huffman Tree, 如此就可以對 MCU 中的資料進行解碼。(宣告部份)　// 遞迴的結構體宣告, 包含一個資料與兩個指向下一個節點的指標　struct stHuffmanDecodingTreeNode　　{ 　　int iCategory; 　　struct stHuffmanDecodingTreeNode *ZeroSubtree; 　　struct stHuffmanDecodingTreeNode *OneSubtree; 　　};　stHuffmanDecodingTreeNode *hdtnCurrentNode, *hdtnRoot[2][2];　stHuffmanDecodingTreeNode *hdtnNewNode;(</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6674746187899955583/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/10/huffman-tree-in-jpeg-decoder.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6674746187899955583'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6674746187899955583'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/10/huffman-tree-in-jpeg-decoder.html' title='Huffman Tree in the JPEG Decoder'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7260013666699304711</id><published>2007-09-22T23:55:00.000+08:00</published><updated>2007-09-26T10:09:43.760+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Sampling in JPEG Images</title><summary type='text'>(a) Source image with multiple components規格書 P.25 的 Figure A.1 Source image characteristics, , 如果你仔細觀察, 圖 (a) 共有 Nf 個 components, 用 Ci 來辨識。每個 component 的大小是可以不相同, 分別用 xi, yi 來表示。(b) Characteristics of an image component圖(b) 則是說明了各個變數所代表的意義。定義 X 為 xi 的最大值, Y 為 yi 的最大值, X, Y 的值儲存在 frame header 之中。每個component的大小不同, 代表 JPEG 可以用不同的 sampling factors 來對不同的 components 做 sampling process。Hi 代表水平取樣參數( </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7260013666699304711/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/09/sampling-in-jpeg-images.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7260013666699304711'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7260013666699304711'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/09/sampling-in-jpeg-images.html' title='Sampling in JPEG Images'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-2806356563386531912</id><published>2007-08-26T23:54:00.000+08:00</published><updated>2007-09-22T18:49:30.264+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Marker Code Assignment in JPEG files</title><summary type='text'>規格書 P. 32 的 Table B.1 列出了所有的 JPEG 可能使用到的 Marker。JPEG 的 Marker Segments 就是由一個 Marker 後面連接著一串相關的參數。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/2806356563386531912/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/08/marker-code-assignment-in-jpeg-files.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2806356563386531912'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2806356563386531912'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/08/marker-code-assignment-in-jpeg-files.html' title='Marker Code Assignment in JPEG files'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-2508972267923196485</id><published>2007-08-26T10:14:00.004+08:00</published><updated>2011-09-12T17:14:21.690+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Restart Interval in JPEG files</title><summary type='text'>這個圖是出現在規格書 P.43, Figure B.9 - Restart interval definition syntax。DRI: Define restart interval marker　從規格書 Table B.1 中可以查到 DRI marker 的 code assignments 是 X'FFDD', 在 Rex.pdf 文件中, DRI marker 是出現在 P.23, address 00003586h。Lr: Define restart interval segment length　從規格書 Table B.8 可以看到 Lr 的值永遠為 4 , 表示 DRI segment 的長度是固定為 4。Ri: Restart interval - Specifies the number of MCU in the restart interval.　Ri </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/2508972267923196485/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/08/restart-interval-in-jpeg-files.html#comment-form' title='1 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2508972267923196485'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2508972267923196485'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/08/restart-interval-in-jpeg-files.html' title='Restart Interval in JPEG files'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>1</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-4645435993416463246</id><published>2007-08-23T13:44:00.000+08:00</published><updated>2007-08-26T09:53:15.221+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Frame Header in JPEG files</title><summary type='text'>Frame header 出現在 frame 資料的最前端, 主要指明:1. the source image characteristics,　來源影像的一些特性, 如長、寬等。2. the components in the frame,　來源影像由多少個 components 組成。3. the sampling factors for each component,　每一個 component 的取樣因數。4. the destination from which the quantized tables to be used with each component are retrieved.　每一個 quantization table 都有一個 destination identifier, 當我們要指明某個 component 要使用哪一個 quantization </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/4645435993416463246/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/08/frame-header-in-jpeg-files.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4645435993416463246'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/4645435993416463246'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/08/frame-header-in-jpeg-files.html' title='Frame Header in JPEG files'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-207083914651418795</id><published>2007-08-19T01:24:00.002+08:00</published><updated>2011-09-07T16:08:27.414+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>JPEG High-level Syntax</title><summary type='text'>這是 JPEG 規格書 P. 34 所提供的語法圖(Figure B.2), 如果想看懂 JPEG 儲存格式, 然後寫一個 JPEG Decoder, 可以從看懂這個圖開始著手。由上而下的第一層告訴我們: JPEG Compressed image data 最前面必須有一個 SOI marker, 最後面則是 EOI marker, 中間的資料則是 Frame, 一張影像其實就是一個 Frame。所謂的 SOI, 就是 Start of image 的縮寫, 在規格書 P. 32 Table B.1 中, 可以查到 SOI 的 Code Assignment 是 X'FFD8'。同樣地, EOI 就是 End of Image 的縮寫, Code Assignment 則是 X'FFD9'。 將左圖 Rex.jpg 用 UltraEdit 開啟, 就可以看到 Rex.pdf </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/207083914651418795/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/08/jpeg-high-level-syntax.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/207083914651418795'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/207083914651418795'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/08/jpeg-high-level-syntax.html' title='JPEG High-level Syntax'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-8718204814984238001</id><published>2007-08-13T13:54:00.004+08:00</published><updated>2011-09-08T09:01:35.361+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Huffman coding'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Huffman Table Generating Procedures</title><summary type='text'>在了解 JPEG 影像檔如何儲存 Huffman tables 之後, 接下來就是要將儲存在檔頭 (header) 的參數(paremeters) 轉換成解壓縮時能用的 Huffman tables。JPEG 規格書 的 Annex C , 提供了一套完整的作法。整個演算法包含三個程序:1. Figure C.1 : generates a table of Huffman code sizes.　Goal: 讀取儲存在 JPEG 檔頭中的 BITS list, 將其轉換成儲存每個 Huffman code 的長度。　input: BITS list　output: HUFFSIZE table　以 Rex.jpg 的第 1 個 Huffman table 為例,　BITS 為 0, 0, 7, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0　HUFFSIZE</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/8718204814984238001/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/08/huffman-table-generating-procedure.html#comment-form' title='2 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8718204814984238001'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8718204814984238001'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/08/huffman-table-generating-procedure.html' title='Huffman Table Generating Procedures'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>2</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-5936332101831946807</id><published>2007-08-11T10:18:00.009+08:00</published><updated>2011-09-08T09:36:28.661+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Huffman coding'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>Huffman Tables in JPEG Files</title><summary type='text'>在 JPEG 影像壓縮標準中, DCT係數經過量化( quantization )後, 會使用熵編碼( entropy coding )來做更進一步的資料壓縮處理。在JPEG壓縮中, 熵編碼最常使用的技術就是霍夫曼編碼技術(Huffman coding)。因此, 在每一個 JPEG 影像壓縮檔 ( *.jpg ) 的檔頭中, 都會定義 Huffman table, 而 X'FFC4' 就是 Define Huffman table(s) - DHT 的 marker。當我們在 JPEG 影像檔頭中搜尋到 X'FFC4',  這表示接下來的資料就是在解壓縮時, 會用到的 Huffman table。Huffman Table 的儲存語法在規格書 B.2.4.2 有完整說明, 這邊我們則再進一步解釋, 讓大家更容易看懂規格書。Lh: Huffman table definition </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/5936332101831946807/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/08/huffman-tables-in-jpeg-files.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5936332101831946807'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5936332101831946807'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/08/huffman-tables-in-jpeg-files.html' title='Huffman Tables in JPEG Files'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-123546833060667919</id><published>2007-06-30T14:22:00.006+08:00</published><updated>2010-02-05T11:47:54.480+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='RS steganalysis'/><category scheme='http://www.blogger.com/atom/ns#' term='steganalysis'/><category scheme='http://www.blogger.com/atom/ns#' term='J. Fridrich'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><title type='text'>Detecting LSB Steganography in Color and Gray-Scale Images (RS steganalysis)</title><summary type='text'>Detecting LSB Steganography in Color and Gray-Scale ImagesJessica Fridrich, Miroslav Goljan, Rui DuMagazine of IEEE Multimedia, Special Issue on Security,October-November 2001, pp. 22-28.這篇論文將一張影像中的連續像素切割成一個一個的 pixel group G = (x1, x2, ... xn)。假設每一個 pixel group 的大小為 2*2, 那麼一張 384*256 大小的影像, 就會有  (384/2)*(256/2) =  24576 個 pixel groups。針對每個 group, 根據其特性將會被分成 Regular, Singular, Unusable 等三類。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/123546833060667919/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/06/rs-steganalysis.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/123546833060667919'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/123546833060667919'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/06/rs-steganalysis.html' title='Detecting LSB Steganography in Color and Gray-Scale Images (RS steganalysis)'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-2894592309772368650</id><published>2007-06-30T01:25:00.000+08:00</published><updated>2007-06-30T01:33:30.259+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 興大生化所教授張邦彥論文 國科會證實部分造假</title><summary type='text'>新聞原文連結(中時電子報 2007/06/29 04:39 記者 李宗祐 台北報導)中興大學生物化學研究所教授張邦彥，去年十月在國際頂尖學術期刊《細胞》（Cell）發表論文，被檢舉涉嫌變造實驗數據及圖片，引發違反學術倫理風波。國科會歷經半年調查後，確認張邦彥發表的論文有部分實驗數據造假，裁定停權三年處分；由國科會補助經費正在執行中的研究計畫，也必須全面停止。掛名學生 追回博士學位張邦彥原是我國第一位在《細胞》發表論文的學者，但遭大陸學者質疑，也成為第一個被迫在國際知名期刊撤除論文的學者。國科會日前召開學術倫理委員會，做成決議，張邦彥的停權處分追溯自今年元月生效，直至九十八年十二月卅一日為止。期間不得向國科會申請研究計畫補助，連同執行中的卓越計畫也必須全面停止；已審查通過、尚未申請經費補助的研究計畫，不得提出申請。中興大學也完成內部懲處報告，限制張邦彥三年內不能升等，不能申請各項獎助。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/2894592309772368650/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/06/news.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2894592309772368650'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2894592309772368650'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/06/news.html' title='News: 興大生化所教授張邦彥論文 國科會證實部分造假'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-1697241482413364262</id><published>2007-06-29T12:04:00.002+08:00</published><updated>2008-10-27T10:34:05.929+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='QIM'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='G. Wornell'/><title type='text'>關於 QIM 的點點滴滴(二): G. Wornell</title><summary type='text'>Quantization Index Modulation: A Class of Provably Good Methods for Digital Watermarking and Information EmbeddingIEEE Trans. on Information Theory, Vol. 47, No. 4, May 2001Brian Chen, Gregory W. Wornell這篇論文從 2001 年 5 月發表迄今(2007/6/29) , 總共被引用了 428 次 ( 在 Google 的學術搜尋上查到的數據 ), 顯示了此篇論文的重要性。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/1697241482413364262/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/06/qim.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1697241482413364262'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1697241482413364262'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/06/qim.html' title='關於 QIM 的點點滴滴(二): G. Wornell'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-2185111970066189546</id><published>2007-06-28T10:51:00.001+08:00</published><updated>2008-10-27T10:34:12.761+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='JPEG steganography'/><category scheme='http://www.blogger.com/atom/ns#' term='QIM'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='H. Noda'/><title type='text'>關於 QIM 的點點滴滴(一): H. Noda</title><summary type='text'>High-performance JPEG steganography using quantization index modulation in DCT domainPattern Recognition Letters, Vol. 27 ,  Iss. 5  (April 2006)Hideki Noda (野田 秀樹), Michiharu Niimi (新見 道治), Eiji Kawaguchi (河口 英二)Hideki Noda 野田 秀樹這篇 paper 的 Section 2 大致介紹了 Chen and Wornell 在 2001年 5 月在 IEEE Trans. on Information Theory 所提出的  QIM 嵌入技術。QIM embedding 使用 2 個 quantizers 來取代原先用於 JPEG 壓縮程序的 1 個 </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/2185111970066189546/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/06/qim-quantization-index-modulation.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2185111970066189546'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2185111970066189546'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/06/qim-quantization-index-modulation.html' title='關於 QIM 的點點滴滴(一): H. Noda'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-2415005627492727619</id><published>2007-04-22T23:50:00.002+08:00</published><updated>2010-07-29T23:24:43.093+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='null cipher'/><category scheme='http://www.blogger.com/atom/ns#' term='cipher'/><category scheme='http://www.blogger.com/atom/ns#' term='books'/><category scheme='http://www.blogger.com/atom/ns#' term='history'/><title type='text'>Null Cipher in Chinese Medicine History</title><summary type='text'>  上個星期逛台北捷運的地下書街, 看到了這本《中醫藥典故與傳說》, 第七章的醫家軼聞, 我首先閱讀了我較為熟悉的醫聖張仲景部份, 其中有一個故事就是張仲景利用 Null Cipher 這樣的技術巧戲庸官, 故事中的方子如下:柏子仁三錢木瓜二錢官桂二錢柴胡三錢益智二錢附子二錢八角二錢人蔘一錢台烏三錢上党三錢山藥二錢　</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/2415005627492727619/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/04/null-cipher-in-chinese-medicine.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2415005627492727619'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2415005627492727619'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/04/null-cipher-in-chinese-medicine.html' title='Null Cipher in Chinese Medicine History'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-6174502722134076169</id><published>2007-03-08T11:03:00.003+08:00</published><updated>2010-12-21T14:05:28.379+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='S-Tools'/><category scheme='http://www.blogger.com/atom/ns#' term='stego-tools'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Johnson'/><title type='text'>S-Tools</title><summary type='text'>Author: Andy BrownVer. 1.0 (1994), Ver. 2.0 (1994), Ver. 3.0 (1995), Ver. 4.0 (1996)最早接觸到 S-Tools 這個隱藏軟體是從 Neil F. Johnson 1998 February 發表在 IEEE Computer 的文章 "Steganography: Seeing the Unseen", 文章中所使用的例子是將 CORONA 偵查衛星於1966/08/20 所拍攝的前蘇聯哈薩克戰略轟炸機基地空照圖 (Soviet strategic bomber base) 隱藏到印象派大師 Pierre-Auguste Renoir (1841-1919) 的畫作 Le Moulin de la Galette (1876) 之中, 讓我印象深刻。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/6174502722134076169/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/03/s-tools.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6174502722134076169'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/6174502722134076169'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/03/s-tools.html' title='S-Tools'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-8094862439314989661</id><published>2007-03-04T10:42:00.000+08:00</published><updated>2007-03-04T10:47:07.341+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='S. Katzenbeisser'/><category scheme='http://www.blogger.com/atom/ns#' term='F. Petitcolas'/><category scheme='http://www.blogger.com/atom/ns#' term='books'/><title type='text'>INFORMATION HIDING techniques for steganography and digital watermarking</title><summary type='text'>Editors: Stefan Katzenbeisser &amp; Fabien A. P. PetitcolasARTECH HOUSE, Computer Security SeriesISBN 1-58053-035-4(Available on Amazon.com)This book surveys recent research results in the fields of watermarking and steganography, two disciplines generally referred to as information hiding. Included are chapters about the following topics: * Chapter 1: Introduction to information hiding(Fabien A. P. </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/8094862439314989661/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/03/information-hiding-techniques-for.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8094862439314989661'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8094862439314989661'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/03/information-hiding-techniques-for.html' title='INFORMATION HIDING techniques for steganography and digital watermarking'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-5553585449046144238</id><published>2007-01-17T22:25:00.000+08:00</published><updated>2007-01-17T23:01:21.332+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><title type='text'>IIH-MSP 2007</title><summary type='text'>The third International Conference on Intelligent Information Hiding and Multimedia Signal ProcessingNovember 26-28, 2007Kaohsiung City, Taiwanhttp://bit.kuas.edu.tw/~iihmsp07/SCOPE: Topics of interest include, but are not limited to:Track I: Information Hiding and Security- Watermarking: techniques, attacks, protocols, applications- Steganography and steganalysis: techniques, protocols, </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/5553585449046144238/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/01/iih-msp-2007.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5553585449046144238'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/5553585449046144238'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/01/iih-msp-2007.html' title='IIH-MSP 2007'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7768830520321525663</id><published>2007-01-10T16:30:00.000+08:00</published><updated>2007-01-10T16:53:12.221+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><category scheme='http://www.blogger.com/atom/ns#' term='ICICIC 2007'/><title type='text'>ICICIC 2007</title><summary type='text'>昨天幾個同事和熟悉歐洲旅遊的蕭桂芳老師(英國曼徹斯特大學畢業)談過後, 覺得 CAIP 2007 所在地奧地利維也納並不是英語系國家, 對我們來說, 要找到配合會議的旅行團, 還有自助旅行都不是件容易的事。因此, 就決定把目標改成 ICICIC 2007 了,...ICICIC 2007The Second International Conference onInnovative Computing, Information and ControlSeptember 5 - 7, 2007Kumamoto City International Center, Kumamoto, Japan熊本 . 九州 . 日本Innovative Computing and Information* Signal and Image Processing* Speech and Audio </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7768830520321525663/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2007/01/icicic-2007.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7768830520321525663'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7768830520321525663'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2007/01/icicic-2007.html' title='ICICIC 2007'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-1468238565779172296</id><published>2006-12-26T20:08:00.001+08:00</published><updated>2008-03-06T20:49:57.993+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><title type='text'>CAIP 2007</title><summary type='text'>今天下午和實驗室老師討論的結果, 決定今年暑假要參加的學術研討會鎖定為由 IAPR 所主辦的 CAIP 2007。現在目標已經設定了, 接下來就要衝了...The 12th International Conference on Computer Analysis of Images and PatternsAugust 27th - August 29th, 2007Vienna, Austria         Paper submission deadline:                   March 30th, 2007                          Notification of Acceptance:                   May 14th, 2007                         Camera ready </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/1468238565779172296/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/12/caip-2007.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1468238565779172296'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1468238565779172296'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/12/caip-2007.html' title='CAIP 2007'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-8365346441357718189</id><published>2006-12-22T02:03:00.003+08:00</published><updated>2009-10-13T22:41:55.008+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 中興大學知名生化教授張邦彥撤銷 Cell 雜誌論文</title><summary type='text'>（自由時報 2006/12/16 記者蘇孟娟 台中報導）　新聞原文連結中國留美學生檢舉中興大學生化所教授張邦彥一篇「發現細菌基因轉錄起始因子作用」的研究論文，十月獲世界頂尖生物學雜誌Cell刊登；日前一名留美中國學生舉發，其中圖片有人為修改痕跡。興大組成跨校專業委員會審理後，認定張邦彥須為不當圖片操作負責；張邦彥十五日指出，所有研究均是真實結果，但為回歸實驗室平靜，已向Cell雜誌提出撤銷申請。被指修改圖片張邦彥強調，相關研究內容均是真實實驗的情況，他未曾加油添醋，圖片是研究所學生為讓人更清楚了解，準備圖檔時直接在原始數據檔中進行標示，造成部分研究數據的原始檔案不齊全，但並不影響研究論點與結論，而且實驗結果可以重複驗證，他雖撤回論文，但「研究歷史絕對會證明我的清白」。張邦彥的研究論文獲Cell雜誌刊登，是台灣第一次登上該雜誌的學術研究，興大在十月廿六日特地向外界傳達這項傑出成就，</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/8365346441357718189/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/12/news-cell.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8365346441357718189'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/8365346441357718189'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/12/news-cell.html' title='News: 中興大學知名生化教授張邦彥撤銷 Cell 雜誌論文'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-2663960927897150842</id><published>2006-12-18T15:50:00.001+08:00</published><updated>2008-10-27T10:34:59.995+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='introduction'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Provos'/><title type='text'>Hide and Seek: An Introduction to Steganography</title><summary type='text'>OutGusee 的作者 Niels Provos 和他的指導教授 Peter Honeyman 在 2003 年 May/June 的 IEEE Security &amp; Privacy 雜誌發表了一篇隱藏學的介紹性文章 "Hide and Seek: An Introduction to Steganography"。這篇文章分成三大主軸:1. The basics of embedding　a. capacity, security, robustness　b. steganography &amp; watermarking　c. Kerckhoffs' Principle　d. Alice &amp; Bob2. Hide and seek　a. Discrete Cosine Transform (DCT)　b. Sequential　c. Pseudo random　d. </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/2663960927897150842/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/12/hide-and-seek-introduction-to.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2663960927897150842'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/2663960927897150842'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/12/hide-and-seek-introduction-to.html' title='Hide and Seek: An Introduction to Steganography'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-1298578843830037728</id><published>2006-12-17T17:38:00.003+08:00</published><updated>2012-01-16T14:02:34.644+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='attack'/><category scheme='http://www.blogger.com/atom/ns#' term='OutGuess'/><category scheme='http://www.blogger.com/atom/ns#' term='J. Fridrich'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><title type='text'>Attacking the OutGuess</title><summary type='text'>Jessica Fridrich, Miroslav Goljan &amp; Dorin Hogea"Attacking the OutGuess,"ACM Workshop on Multimedia and Security 2002,Juan-les-Pins, France, December 6, 2002AbstractIn this paper, we describe new methodology for developing steganalytic methods for JPEG images. The proposed framework can be applied to virtually all current methods for JPEGs including OutGuess, F5, and J-Steg. It also enables </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/1298578843830037728/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/12/attacking-outguess.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1298578843830037728'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/1298578843830037728'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/12/attacking-outguess.html' title='Attacking the OutGuess'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-3419532074516990389</id><published>2006-12-16T22:48:00.001+08:00</published><updated>2008-10-29T09:56:16.681+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='history'/><title type='text'>Origin of Steganography</title><summary type='text'>隱藏學的起源, 最早可回溯到兩千多年以前的古希臘時代, 在希臘歷史學家 Herodotus 的史著中, 記載著一個非常有名的故事:西元前 491 年, 斯巴達國王 Demaratus 因故被放逐後, 被對希臘懷有侵略野心的東方帝國 - 波斯, 奉為上賓。波斯皇帝 Xerxes 在弭平埃及反抗叛亂後, 開始著手安排對希臘各城邦的侵略戰爭。Demaratus 獲知 Xerxes 的意圖後, 便將平時書寫用的小蠟板, 把上層蠟括除, 再將 Xerxes 的企圖刻在木板, 重新用蠟封起, 送回斯巴達皇宮。由於小蠟板的外觀看起來並無異狀, 因此能夠順利通過邊境檢查, 送到斯巴達國王 Leonidas 手中。然而, 並沒有人能夠馬上理會出小蠟板的用意, 最後是由 Leonidas 的妻子 Gorgo 猜出小蠟板的下方可能藏有訊息, 命人括去蠟層後, 使得波斯帝國即將大舉入侵的消息揭露出來。斯巴達皇后</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/3419532074516990389/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/12/origin-of-steganography.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/3419532074516990389'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/3419532074516990389'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/12/origin-of-steganography.html' title='Origin of Steganography'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7612641049447467825</id><published>2006-12-01T11:45:00.000+08:00</published><updated>2006-12-02T11:36:27.043+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='dictionary'/><title type='text'>Steganography in Merrian-Webster Online</title><summary type='text'>前幾天收到 Merrian-Webster Online 用 email 寄來的 Word of the Day ( November 26, 2006 ) 剛好就是介紹 steganography 這個字, 這個字之前我在 Merrian-Webster Online 是查不到的, 不過現在已經補上來了, 我們來看看 email 的介紹內容:steganography   \steg-uh-NAH-gruh-fee\ noun: the art or practice of concealing a message, image, or file within another message, image, or fileExample sentence: No doubt, the Internet has enriched society, but it has a flip </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7612641049447467825/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/12/steganography-in-merrian-webster-online.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7612641049447467825'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7612641049447467825'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/12/steganography-in-merrian-webster-online.html' title='Steganography in Merrian-Webster Online'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-7290768842886881843</id><published>2006-12-01T10:45:00.000+08:00</published><updated>2006-12-01T10:57:13.835+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>JPEG Standard</title><summary type='text'>This CCITT Recommendation | ISO/IEC International Standard was prepared by CCITT Study Group VIII and the Joint Photographic Experts Group (JPEG) of ISO/IEC JTC 1/SC 29/WG 10. This Experts Group was formed in 1986 to establish a standard for the sequential progressive encoding of continuous tone grayscale and colour images.CCITT Rec. T.81 (1992 E)"INFORMATION TECHNOLOGY – DIGITAL COMPRESSION AND </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/7290768842886881843/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/12/jpeg-standard.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7290768842886881843'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/7290768842886881843'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/12/jpeg-standard.html' title='JPEG Standard'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116351330259818012</id><published>2006-11-14T22:04:00.000+08:00</published><updated>2006-12-01T10:29:33.035+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 台灣研究論文被引用次數 亞太地區僅次日本</title><summary type='text'>（中央社 2006-11-14 19:03 記者劉嘉韻台北十四日電）新聞轉載原址過去十年間，台灣發表的研究論文數量在全球排名第十八名，在亞太地區排名第五，不過，台灣研究論文的被引用次數，卻為亞太地區第二名，僅次於日本；主辦卓越研究獎的湯姆森集團指出，數據反映出台灣地區的學術研究成果，已逐漸佔有國際領先地位。湯姆森卓越研究獎首度在台頒發，共有八名學者獲獎；湯姆森集團資深研究員 Nobuko Miyairi 分析指出，近年來台灣研發人員的研究報告被引用次數逐年攀升，顯示台灣學者的研究，在國際學術界越來越重要。根據湯姆森集團提供的統計數據，一九九六年至二００六年間，世界各國發表學術論文的篇數，美國以兩百八十多萬篇排名第一，日本以七十七萬多篇排名第二，而中國大陸也以四十多萬篇排名第六，南韓十七萬三千多篇排名第十四，台灣以十二萬零四百四十七篇排名全球第十八名、亞太地區第五名。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116351330259818012/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/11/news.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116351330259818012'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116351330259818012'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/11/news.html' title='News: 台灣研究論文被引用次數 亞太地區僅次日本'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116324961976171660</id><published>2006-11-11T20:24:00.002+08:00</published><updated>2010-07-29T23:25:47.301+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='null cipher'/><category scheme='http://www.blogger.com/atom/ns#' term='cipher'/><category scheme='http://www.blogger.com/atom/ns#' term='books'/><category scheme='http://www.blogger.com/atom/ns#' term='history'/><title type='text'>Null Cipher</title><summary type='text'>A null cipher hides the message according to some prearranged set of rules, such as "read every fifth word" or "look at the third character in every word."一次世界大戰 (WWI) 期間, 一名德國間諜利用 Null Cipher 的方式, 從美國 Washington, D.C. 向位於 Berlin 總部回報了底下這段文字:PRESIDENT'S EMBARGO RULING SHOULD HAVE IMMEDIATE NOTICE. GRAVE SITUATION AFFECTING INTERNATIONAL LAW. STATEMENT FORESHADOWS RUIN OF MANY NEUTRALS. YELLOW </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116324961976171660/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/11/null-cipher.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116324961976171660'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116324961976171660'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/11/null-cipher.html' title='Null Cipher'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116159567055924226</id><published>2006-10-23T17:14:00.001+08:00</published><updated>2008-11-10T21:17:17.575+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='JPEG steganography'/><category scheme='http://www.blogger.com/atom/ns#' term='A. Latham'/><category scheme='http://www.blogger.com/atom/ns#' term='stego-tools'/><category scheme='http://www.blogger.com/atom/ns#' term='JPHide'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><title type='text'>JPHIDE and JPSEEK Offical Website</title><summary type='text'>1999年 8 月推出的 JPHIDE and JPSEEK,作者: Allan Latham ( alatham@flexsys-group.com ),官方網站網址:  http://linux01.gwdg.de/~alatham/stego.html。在官網中, 作者對於這個隱藏軟體的描述如下:JPHIDE and JPSEEK are programs which allow you to hide a file in a jpeg visual image. There are lots of versions of similar programs available on the internet but JPHIDE and JPSEEK are rather special. The design objective was not simply to hide a </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116159567055924226/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/10/jphide-and-jpseek-offical-website.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116159567055924226'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116159567055924226'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/10/jphide-and-jpseek-offical-website.html' title='JPHIDE and JPSEEK Offical Website'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116153770419081789</id><published>2006-10-23T01:20:00.000+08:00</published><updated>2007-11-06T00:57:06.076+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='JPEG steganography'/><category scheme='http://www.blogger.com/atom/ns#' term='stego-tools'/><category scheme='http://www.blogger.com/atom/ns#' term='JPHide'/><category scheme='http://www.blogger.com/atom/ns#' term='OutGuess'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Provos'/><title type='text'>Steganographic Tools for JPEG Images</title><summary type='text'>JPEG standard 是 Internet 上使用最廣泛的影像儲存格式。因此, 網路上也有許多隱藏軟體 ( steganographic software ) 可以將訊息藏到 JPEG 影像中, 然後透過 Internet 傳送秘密訊息。Niels Provos &amp; Peter Honeyman 在 2002 年 ISOC NDSS'02 研討會提出  " Detecting Steganographic Content on the Internet "  這篇論文, 文中 P.4 提到了三個在 Internet 上較普及的隱藏軟體。There are three popular steganographic systems available on the Internet that hide information in JPEG images:• JSteg, </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116153770419081789/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/10/steganographic-tools-for-jpeg-images.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116153770419081789'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116153770419081789'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/10/steganographic-tools-for-jpeg-images.html' title='Steganographic Tools for JPEG Images'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116152379455771445</id><published>2006-10-04T05:14:00.000+08:00</published><updated>2006-12-01T10:35:23.675+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 國科會 3 年期研究計畫優先審查補助</title><summary type='text'>明年起 國科會重大改革 3年期研究計畫 優先審查補助（中國時報   2006/10/02 李宗祐 台北報導） 新聞原文連結最為學術界詬病的國科會研究補助審查制度，明年起有重大變革！為鼓勵學者研究計畫「重質不重量」，明年起，國科會以「三年期」研究計畫優先審查補助；若無 特殊理由，「一年期」研究計畫很難再獲補助。由於事涉國內各大學及研究機構數萬名學者權益，國科會最近陸續透過研討會說明制度變革內容。副主委楊弘敦表示，學者現所提都是短程的一年期計畫，但重大研究需要長期投入才有具體成效，因此今年試辦鼓勵學者提出「三年期」研究計畫。但試辦情況不理 想，審查通過的補助計畫仍有七○％到八○％是一年期研究計畫。楊弘敦指出，目前每年向國科會申請經費補助的研究計畫超過三萬件，以五○％通過率計算，每年 獲補助的計畫一萬六、七千件，而超過三成的學者隔年提出的延續性研究計畫都會順利通過審查，要學者每年送審，</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116152379455771445/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/10/news-3.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116152379455771445'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116152379455771445'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/10/news-3.html' title='News: 國科會 3 年期研究計畫優先審查補助'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116145532641115136</id><published>2006-08-30T19:24:00.002+08:00</published><updated>2008-09-08T09:43:32.400+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='SIP 2006'/><title type='text'>在 SIP 2006 與 Session Chair 合照</title><summary type='text'> SIP 2006 的 議程 除了四場的專題演講(Keynote Address) 之外, 論文報告總共分成 9 個 Sessions, 分別是:Session 1 - Pattern RecognitionSession 2 - Video Signal ProcessingSession 3 - Image Processing ApplicationsSession 4 - Image Processing and Analysis ISession 5 - Image Processing and Analysis IISession 6 - Biomedical Signal and Image ProcessingSession 7 - Signal Processing for CommunicationSession 8 - Signal Processing </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116145532641115136/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/08/sip-2006-session-chair.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116145532641115136'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116145532641115136'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/08/sip-2006-session-chair.html' title='在 SIP 2006 與 Session Chair 合照'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116145413746751603</id><published>2006-08-30T00:52:00.002+08:00</published><updated>2008-09-08T09:45:55.574+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='SIP 2006'/><title type='text'>在 SIP 2006 巧遇王元凱教授</title><summary type='text'>2006/08/14 下午, 我們前往 SIP2006 會議會場 Sheraton Waikiki Hotel 報到, 在放置點心的交流廳巧遇了也是同樣來自台灣的 王元凱教授, 王教授任教於 輔大電子系, 也曾經當過 IAPR 學會 Taiwan 分會的祕書長, 去年在翡翠灣舉辦過 CVGIP 2005 研討會, 我們實驗室也有不少老師同學前往參加該研討會。因此, 大家還算熟識, 這次在夏威夷相遇, 實在頗神奇。不過更神奇的是王教授夫婦也是住在整修中的 Ohana Islander Waikiki。王教授發表的論文被安排在會議第一天下午報告, 此時他已經報告完畢, 無事一身輕了。你注意到我們所背的 IASTED 包包了嗎? 標價一個 670 美元, 可不輸給LV 呢！至於身上的 Aloha Shirt, 則是路邊攤買的, 15 美元搞定。今天的任務是要把論文報告的會場弄清楚, </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116145413746751603/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/08/sip-2006_29.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116145413746751603'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116145413746751603'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/08/sip-2006_29.html' title='在 SIP 2006 巧遇王元凱教授'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116145169039061441</id><published>2006-08-12T23:30:00.001+08:00</published><updated>2008-03-15T15:17:29.103+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='SIP 2006'/><title type='text'>SIP 2006 的投影片終於完成了</title><summary type='text'>今天晚上要搭機前往夏威夷, 終於趕在昨晚把投影片完成了, 前後差不多改了一個星期才完成。A NOVEL QUANTITY BASED ON CLIPPING STATISTICS FOR JSTEG STEGANALYSIS,Yeuan-Kuen Lee, Shih-Yu Hwang, Zhan-He Ou,8th IASTED Int. Con. on Signal &amp; Image Processing (SIP 2006),August 14-16, 2006, Honolulu, Hawaii, USAPPT Download ...</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116145169039061441/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/08/sip-2006.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116145169039061441'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116145169039061441'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/08/sip-2006.html' title='SIP 2006 的投影片終於完成了'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116145111389167387</id><published>2006-07-02T01:30:00.003+08:00</published><updated>2009-01-06T10:22:54.967+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='Y.-K. Lee'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='SIP 2006'/><title type='text'>SIP 2006 的 final paper</title><summary type='text'>A NOVEL QUANTITY BASED ON CLIPPING STATISTICS FOR JSTEG STEGANALYSIS,Yeuan-Kuen Lee, Shih-Yu Hwang, Zhan-He Ou,8th IASTED Int. Con. on Signal &amp; Image Processing (SIP 2006),August 14-16, 2006, Honolulu, Hawaii, USA這篇論文是根據 reviewers 的意見修改後,再依照 SIP 研討會的論文格式編輯後的 final paper。 這次的論文修改, 主要著重在加強實驗的測試影像與描述實驗結果上。根據第二位 reviewer 的意見, 我們原本的測試影像和依般論文常用的影像不同, 所以我特地從 USC-SIPI Image Database 的 Miscellaneous 中, </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116145111389167387/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/07/sip-2006-final-paper.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116145111389167387'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116145111389167387'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/07/sip-2006-final-paper.html' title='SIP 2006 的 final paper'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116144508393049032</id><published>2006-04-15T00:45:00.003+08:00</published><updated>2012-01-16T17:58:19.235+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><title type='text'>News: 印度推出世界最大的免費期刊搜尋平台</title><summary type='text'>World's biggest Open Access English Language Journals PortalOpen J-Gatehttp://www.jgate.in/訊息來源: 國科會 簡訊網印度推出世界最大的免費期刊搜尋平台位於印度班加羅爾的 Informatics 公司推出世界上最大的公開電子期刊入口網站「Open J-gate」。這項服務是免費的，開放給所有人使用。目前這個網站已列入 3000 多本公開使用的電子期刊，涵蓋了一百多萬比筆的文章資訊。這個網站的網址是 http://www.jgate.in/ 推出該網站的 Informatics 公司認為，這個網站對全球性搜尋及公開使用的發展具有貢獻。PS: 班加羅爾 (Bangalore) 在 "世界是平的" 這本書中, 翻成 班加洛, 如果你看了這本書, 你就會感受到這個地方現在站在世界的位置是多麼的舉足輕重。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116144508393049032/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/04/blog-post.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116144508393049032'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116144508393049032'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/04/blog-post.html' title='News: 印度推出世界最大的免費期刊搜尋平台'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116144355598231686</id><published>2006-04-02T15:52:00.001+08:00</published><updated>2008-03-15T15:18:46.983+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='conference'/><category scheme='http://www.blogger.com/atom/ns#' term='SIP 2006'/><title type='text'>投稿 SIP 2006</title><summary type='text'>剛剛終於在最後一刻把論文投稿到 SIP 2006 了, 了結了近兩個月來, 心頭上最大的一件事！研討會是今年八月中旬在夏威夷舉辦, 可不可以去就要等五月中的通知。論文的題目我定為: A NOVEL QUANTITY BASED ON CLIPPING STATISTICS FOR JSTEG STEGANALYSIS, 其實我原本想要改成: QUANTITATIVE STEGANALYSIS BASED ON CLIPPING STATISTICS FOR JSTEG IMAGES, 後來覺得還是保守一點, 將這篇論文的貢獻定位在提出一個新的 quantity 就好, 等將來把這個題目做得更完整一點, 再把題目定得看起來很了不起。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116144355598231686/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/04/sip-2006.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116144355598231686'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116144355598231686'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/04/sip-2006.html' title='投稿 SIP 2006'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116143178864854535</id><published>2006-03-21T01:17:00.003+08:00</published><updated>2008-10-27T10:35:25.931+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='stego-tools'/><category scheme='http://www.blogger.com/atom/ns#' term='OutGuess'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Provos'/><title type='text'>About OutGuess ... (part 1): N. Provos</title><summary type='text'>  OutGuess by Neils ProvosOffical Website: www.outguess.orgNiels Provos &amp; Peter Honeyman 在 2001 年CITI 的技術報告, 還有 2002年 ISOC NDSS'02 研討會論文 "Detecting Steganographic Content on the Internet" 中是這樣描述 OutGuess 的:[ P.5 ]　OutGuess is a steganographic system available as UNIX source code. There are two released versions: OutGuess 0.13b, which is vulnerable to statistical analysis, and OutGuess 0.2, which </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116143178864854535/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/03/outguess-n-provos.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116143178864854535'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116143178864854535'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/03/outguess-n-provos.html' title='About OutGuess ... (part 1): N. Provos'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116142846622248782</id><published>2006-03-19T15:37:00.003+08:00</published><updated>2010-11-30T16:43:54.418+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='F5'/><category scheme='http://www.blogger.com/atom/ns#' term='A. Westfeld'/><category scheme='http://www.blogger.com/atom/ns#' term='JPEG steganography'/><category scheme='http://www.blogger.com/atom/ns#' term='A. Pfitzmann'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='IHW 1999'/><category scheme='http://www.blogger.com/atom/ns#' term='Jsteg'/><category scheme='http://www.blogger.com/atom/ns#' term='IHW 2001'/><title type='text'>關於 Jsteg 的點點滴滴 (六) : A. Westfeld</title><summary type='text'>Andreas Westfeld &amp; Andreas Phitzmann 在 IHW99 的論文 "Attacks on Steganographic System" 中, 曾經三次提到 Jsteg:1. 在 P.3 提到 Tinsley 的年度報告中有介紹一種關於 Jsteg 的攻擊方法。其實, Tinsley 另外還提出 j1, j2 兩個新嵌入法。Related to this work is Final Year Project of Tinsley on Steganography and JPEG Compression. He describes statistical attacks applied to Jsteg using a different statistical model. 2. P.8 說明為什麼提出來的 Visual Attack 無法運用在破解 </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116142846622248782/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-westfeld.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116142846622248782'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116142846622248782'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-westfeld.html' title='關於 Jsteg 的點點滴滴 (六) : A. Westfeld'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116142346620752791</id><published>2006-03-19T14:05:00.000+08:00</published><updated>2007-07-18T09:57:17.477+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='JPEG steganography'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Provos'/><category scheme='http://www.blogger.com/atom/ns#' term='Jsteg'/><title type='text'>關於 Jsteg 的點點滴滴 (五) : N. Provos</title><summary type='text'>Niels Provos &amp; Peter Honeyman 在 2001 年的技術報告 "Detecting Steganographic Content on the Internet" 中是這樣描述 Jsteg 的:[ P.4 ]JSteg is an addition by Derek Upham to the Independent JPEG Group's JPEG Software library. The DCT coefficients are modified continuously from the beginning of the image. JSteg does not support encryption and has no random bit selection.The message data is prepended with a variable</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116142346620752791/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-n-provos.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116142346620752791'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116142346620752791'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-n-provos.html' title='關於 Jsteg 的點點滴滴 (五) : N. Provos'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116142961799599846</id><published>2006-03-19T07:37:00.001+08:00</published><updated>2008-10-27T10:35:51.402+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='writing'/><title type='text'>About scientific and technical writing... (1)</title><summary type='text'>做研究真的很有趣, 然而, 英文寫作實在不是我的專長, 仔細想想, 自己中文寫的文章和英文寫的文章, 在數量上, 之間的差別也實在太過懸殊了。不過, 既然走上這條路, 也只好慢慢累積了...今天看 Hany Farid 的技術報告 "Detecting Steganographic Messages in Digital Images ", 看到他在描述實驗結果的用句, 正是我上學期在寫國科會結案報告時, 想要描述的情境。當時要寫英文摘要, 也翻了好多論文想參考別人的用法。剛剛在想, 如果當時有翻到這篇報告, 參考一下, 應該很快就寫好了。　:)[ P. 5, for Jsteg ]In this example, 99% of the training set is correctly classified. In the testing set 98% of the steg </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116142961799599846/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/03/about-scientific-and-technical-writing.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116142961799599846'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116142961799599846'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/03/about-scientific-and-technical-writing.html' title='About scientific and technical writing... (1)'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116143080726524748</id><published>2006-03-19T04:49:00.001+08:00</published><updated>2008-10-27T10:35:56.486+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='H. Farid'/><category scheme='http://www.blogger.com/atom/ns#' term='application'/><category scheme='http://www.blogger.com/atom/ns#' term='news'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><title type='text'>About applications of steganography ... (1)</title><summary type='text'>今天早上在研讀 Hany Farid 在2001年發表的技術報告 "Detecting Steganographic Messages in Digital Images", 報告中提到了有關 steganography 的應用, 包括:1. unobtrusive military and intelligence communication2. covert criminal communication3. protection of civilian speech against repressive governments.Other applications include unobtrusive military and intelligence communication, covert criminal communication, and the protection </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116143080726524748/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/03/about-applications-of-steganography-1.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116143080726524748'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116143080726524748'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/03/about-applications-of-steganography-1.html' title='About applications of steganography ... (1)'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116142067073983962</id><published>2006-03-16T13:16:00.000+08:00</published><updated>2007-07-18T09:59:45.610+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='JPEG steganography'/><category scheme='http://www.blogger.com/atom/ns#' term='J. Fridrich'/><category scheme='http://www.blogger.com/atom/ns#' term='Jsteg'/><title type='text'>關於 Jsteg 的點點滴滴 (四) : J. Fridrich</title><summary type='text'>Jessica Fridrich 在她 2006 年 Fundamentals of Steganography 課程, Lecture 4 投影片 中, P. 7 談到 Jsteg 的作法, 從投影片中我們清楚的知道 Jsteg 並沒有考慮到四捨五入所造成的影響。完全是針對四捨五入後的 DCT 係數根據要藏入的訊息去修改係數。</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116142067073983962/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-j-fridrich.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116142067073983962'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116142067073983962'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-j-fridrich.html' title='關於 Jsteg 的點點滴滴 (四) : J. Fridrich'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116141330165610481</id><published>2006-03-16T04:03:00.001+08:00</published><updated>2008-10-27T10:36:03.158+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='attack'/><category scheme='http://www.blogger.com/atom/ns#' term='T. Tan'/><category scheme='http://www.blogger.com/atom/ns#' term='papers'/><category scheme='http://www.blogger.com/atom/ns#' term='JPEG steganalysis'/><category scheme='http://www.blogger.com/atom/ns#' term='Jsteg'/><title type='text'>關於 Jsteg 的點點滴滴 (三) : T. Tan</title><summary type='text'>中國模式識別國家重點實驗室(NLPR) 在 ICPR04 (23-26 Aug., Cambridge Univ., UK.) 與 ICIP04 (24-27 Oct., Singapore) 兩個研討會都有論文提出, 論文所提出的方法大致是一樣的, 不過, 實驗範圍則有所延伸。ICPR04 : "On Estimation of Secret Message Length in JSteg-like Steganography"ICIP04 : "Model Based Steganalysis"第一篇論文是針對 Jsteg-like steganography 的兩種嵌入次序 (sequential or random) 做隱藏分析; 第二篇論文則是將實驗範圍延伸到 QIM (Quantization Index Modulation) 嵌入技術。基本上, 兩篇論文在描述 Jsteg</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116141330165610481/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-t-tan.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116141330165610481'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116141330165610481'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-t-tan.html' title='關於 Jsteg 的點點滴滴 (三) : T. Tan'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116141183878139792</id><published>2006-03-14T07:03:00.000+08:00</published><updated>2007-07-18T10:01:50.716+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='JPEG steganography'/><category scheme='http://www.blogger.com/atom/ns#' term='G. Tena'/><category scheme='http://www.blogger.com/atom/ns#' term='jpeg'/><category scheme='http://www.blogger.com/atom/ns#' term='Jsteg'/><title type='text'>關於 Jsteg 的點點滴滴 (二) : G. Tena</title><summary type='text'>Guillermito Zone 的作者是 Guillaume Tena, 是法國資訊安全專家, 目前在美國　Harvard Medical School (HMS) 任職。http://www.guillermito2.net/stegano/jsteg/index.html這個網頁是我看過描述 JPEG steganography 最詳盡的網頁了, 網頁中我個人覺得很精采的部份, 分別如下:1. 首先 Tena 將 Internet 上, 可以將訊息嵌入到 JPEG 影像的軟體, Open Source 都列出來, 並仔細說明其狀況為何。2. 對 JPEG 壓縮技術的解說也非常詳盡, 例子更是清楚。尤其在解釋為什麼要先將 RGB 轉換成 YCbCr 的理由, 為什麼要對 Chrominance 做 subsampling, 更是用圖片解釋得讓你一清二楚。3. 對 DCT 轉換的解釋,</summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116141183878139792/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-g-tena.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116141183878139792'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116141183878139792'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-g-tena.html' title='關於 Jsteg 的點點滴滴 (二) : G. Tena'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry><entry><id>tag:blogger.com,1999:blog-36380956.post-116140556160776996</id><published>2006-03-13T06:51:00.002+08:00</published><updated>2008-10-29T09:52:37.170+08:00</updated><category scheme='http://www.blogger.com/atom/ns#' term='news'/><category scheme='http://www.blogger.com/atom/ns#' term='history'/><category scheme='http://www.blogger.com/atom/ns#' term='N. Johnson'/><category scheme='http://www.blogger.com/atom/ns#' term='Jsteg'/><title type='text'>關於 Jsteg 的點點滴滴 (一) : N. Johnson</title><summary type='text'>Neil F. Johnson &amp; Sushil Jajodia 在 IHW 98 的論文 "Steganalysis of Images Created Using Current Steganography Software" 中, 有兩段提到 Jsteg, 在 P.277 他說 Jsteg 將 information 藏在四捨五入後的 DCT 係數中, 而且使用的技術就是去改變四捨五入的選擇來藏入資料。The tool Jpeg-Jsteg is a steganography tool that hides information by manipulating the rounding values of the JPEG DCT coefficients. Information is hidden in the JPEG image by modulating the </summary><link rel='replies' type='application/atom+xml' href='http://leestego.blogspot.com/feeds/116140556160776996/comments/default' title='Post Comments'/><link rel='replies' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-n-johnson.html#comment-form' title='0 Comments'/><link rel='edit' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116140556160776996'/><link rel='self' type='application/atom+xml' href='http://www.blogger.com/feeds/36380956/posts/default/116140556160776996'/><link rel='alternate' type='text/html' href='http://leestego.blogspot.com/2006/03/jsteg-n-johnson.html' title='關於 Jsteg 的點點滴滴 (一) : N. Johnson'/><author><name>YKLee</name><uri>http://www.blogger.com/profile/18064709962112077522</uri><email>noreply@blogger.com</email><gd:image rel='http://schemas.google.com/g/2005#thumbnail' width='33' height='26' src='http://www.csie.mcu.edu.tw/~yklee/YK2006s.jpg'/></author><thr:total>0</thr:total></entry></feed>
