Week 03: The Prisoners' Problem

1. On Public-Key Steganography in the Presence of an Active Warden
　Scott Craver
　[ IBM Research Report ]

　

2. The prisoners' problem and the subliminal channel

3. 天馬茶房: 林強 - 幸福進行曲

Week 02: Information Hiding

1. 課本圖 1.1 秘密通訊的流程的原始來源是 Information Hiding - A survey [ PDF ] 的 Fig. 1. A classification of information hiding techniques.



2. Enigma



3. Bletchley Park

　
　
　

Week 01: 本課程評分規則

1. 98學年度上學期本課程評分標準

　a. 小考二次 (20% + 20%)
　b. 故事書三選一閱讀分享 (20%)
　c. 論文閱讀一篇 (20%)
　d. 學習態度: 出缺席, 課堂睡覺, 互動討論參與 (20%)
　e. 程式撰寫 (20%)

2. 教科書: 資訊媒體安全 - 偽裝學與數位浮水印

　　

　定價: 560 元, 團購價: 420 元。
　可於 9/24 課堂上繳費領書。

3. 故事書:

　　　　

4. 作業繳交部落格 Homework Show @ IHC

　請修課同學在本篇文章中, 留下學號與 email , 我會發共同作者的邀請信給你, 讓你有權限可以在作業部落格繳交作業。

News: Gordon Brown: I'm proud to say sorry to a real war hero

Gordon Brown: I'm proud to say sorry to a real war hero
The treatment of code-breaker Alan Turing was utterly unfair, says Gordon Brown

By Gordon Brown
Published: 9:30PM BST 10 Sep 2009
Original Link

This 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 stirred in us that sense of pride and gratitude that characterise the British experience. Earlier this year, I stood with Presidents Sarkozy and Obama to honour the service and the sacrifice of the heroes who stormed the beaches of Normandy 65 years ago. And just last week, we marked the 70 years which have passed since the British government declared its willingness to take up arms against fascism and declared the outbreak of the Second World War.

So I am both pleased and proud that, thanks to a coalition of computer scientists, historians and LGBT (lesbian, gay, bisexual and transgender) activists, we have this year a chance to mark and celebrate another contribution to Britain's fight against the darkness of dictatorship: that of code-breaker Alan Turing.


Computer pioneer Alan Turing, who helped crack German Enigma codes during WWII

Turing was a quite brilliant mathematician, most famous for his work on breaking the German Enigma codes. It is no exaggeration to say that, without his outstanding contribution, the history of the Second World War could have been very different. He truly was one of those individuals we can point to whose unique contribution helped to turn the tide of war. The debt of gratitude he is owed makes it all the more horrifying, therefore, that he was treated so inhumanely.

In 1952, he was convicted of "gross indecency" – in effect, tried for being gay. His sentence – and he was faced with the miserable choice of this or prison – was chemical castration by a series of injections of female hormones. He took his own life just two years later.

Thousands of people have come together to demand justice for Alan Turing and recognition of the appalling way he was treated. While Turing was dealt with under the law of the time, and we can't put the clock back, his treatment was of course utterly unfair, and I am pleased to have the chance to say how deeply sorry I and we all are for what happened to him. Alan and the many thousands of other gay men who were convicted, as he was convicted, under homophobic laws, were treated terribly. Over the years, millions more lived in fear in conviction. I am proud that those days are gone and that in the past 12 years this Government has done so much to make life fairer and more equal for our LGBT community. This recognition of Alan's status as one of Britain's most famous victims of homophobia is another step towards equality, and long overdue.

But even more than that, Alan deserves recognition for his contribution to humankind. For those of us born after 1945, into a Europe which is united, democratic and at peace, it is hard to imagine that our continent was once the theatre of mankind's darkest hour. It is difficult to believe that in living memory, people could become so consumed by hate – by anti-Semitism, by homophobia, by xenophobia and other murderous prejudices – that the gas chambers and crematoria became a piece of the European landscape as surely as the galleries and universities and concert halls which had marked out the European civilisation for hundreds of years.

It is thanks to men and women who were totally committed to fighting fascism, people like Alan Turing, that the horrors of the Holocaust and of total war are part of Europe's history and not Europe's present. So on behalf of the British government, and all those who live freely thanks to Alan's work, I am very proud to say: we're sorry. You deserved so much better.