codes/cryptography
Get flash to fully experience Pearltrees
The Secure Hash Algorithm Directory - MD5, SHA-1, HMAC and other Cryptography Resources
Hash algorithms are fundament to many cryptographic applications. Although widely associated with digital signature technology, the hash algorithm has a range of other uses. SHA-1 and MD5 are amongst the most widely known, trusted and used. When utilised with a password (the HMAC version), the potential uses of these algorithms extends further.
Unbreakable: Kryptos, a monument to CIA secrecy - physics-math - 27 May 2011 - New Scientist
Read more: " Unbreakable: Eight codes we can't crack " At the US Central Intelligence Agency's headquarters in Langley, Virginia, there is a monument to secrecy that has vexed both professional and amateur codebreakers for over two decades. Erected in 1990, the Kryptos sculpture is a copper artwork bearing 1735 coded letters.
Colossus computer - Wikipedia, the free encyclopedia
Not to be confused with the fictional computer of the same name in the movie Colossus: The Forbin Project . Colossus was the world's first electronic , digital , programmable computer . Colossus and its successors were used by British codebreakers to help read encrypted German messages during World War II .
Nothing is more beguiling than a secret. It's why codebreaking has always fascinated us. The use of codes and ciphers goes back centuries: they have helped to build empires and divert the path of wars. To mark the 70th anniversary of the capture of an Enigma codebreaking machine, New Scientist has devised four dastardly ciphers.
Short Sharp Science: A brief history of codebreaking: can you crack it?
