Twofish

From CryptoDox, The Online Encyclopedia on Cryptography and Information Security

Twofish is a block cipher developed by Counterpane Labs. Twofish was one of the five finalists for AES. Twofish is unpatented and the source code is uncopyrighted and license-free. The Twofish paper [1] describes the algorithm in detail. Twofish is a symmetric key block cipher with a block size of 128 bits and key sizes up to 256 bits. Twhofish was designed by Bruce Schneier, John Kelsey, Doug Whiting, David Wagner, Chris Hall, and Niels Ferguson.

Source Code

Various implementations of Twofish is available for free download at the Twofish website

Cryptanalysis

There have been some cryptanalysis done on Twofish:

• Cryptanalysis of Twofish (II), Shiho Moriai, Yiqun Lisa Yin (2000)

External Links

• Twofish Website
• David Wagner's sci.crypt post recommending AES over Twofish