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  • The most common way to attack block ciphers is to try various attacks on versions of the cipher with a reduced number o ...centers around the mathematical structure of AES. Unlike most other block ciphers, AES has a very neat algebraic description. This has not yet led to any att ...
    18 KB (2,766 words) - 11:41, 28 March 2008
  • ...in a sense, a modern embodiment of Alberti's polyalphabetic cipher: block ciphers take as input a block of [[plaintext]] and a key, and output a block of cip ...perates. That state's change is controlled by the key, and, in some stream ciphers, by the plaintext stream as well. RC4 is an example of a well-known stream ...
    26 KB (3,873 words) - 11:44, 28 March 2008