Twofish

• Twofish Official Homepage
• Implementations
  • Twofish code
  • Twofish - Performance vs. Other Block Ciphers (by Schneier (incorrect!))
  • Improved Twofish Implementations
  • Implementation of the Twofish Cipher Using FPGA Devices (Pawel Chodowiec, Kris Gaj)
• The Twofish Encryption Algorithm (Schneier @ Dr Dobb's Journal, incl overview of other candidates as well)
• The Twofish Team's Final Comments on AES Selection (Bruce Schneier, John Kelsey, Doug Whiting, David Wagner, Chris Hall, Niels Ferguson, Tadayoshi Kohno, Mike Stay, 2000)
• Cryptanalysis
  • Upper bounds on differential characteristics in Twofish (Niels Ferguson, 1998)
  • Trawling Twofish (Lars Knudsen, 2000)
  • Trawling Twofish (Revisited) (Lars Knudsen, 2000)
  • Differential Cryptanalysis, Key-dependent S-boxes, and Twofish (Sean Murphy, M.J.B. Robshaw)
  • The Saturation Attack - a Bait for Twofish (Stefan Lucks, eprint 2000/046)

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Cryptology Pointers by Helger Lipmaa
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(C) Helger Lipmaa 1997-2009.