Twofish

Twofish Cipher

Designers:

Bruce Schneier, John Kelsey, Doug Whiting, David Wagner, Chris Hall, Niels Ferguson

Published:

1998

References:

[Def, An] Bruce Schneier, John Kelsey, Doug Whiting, David Wagner, Chris Hall, Niels Ferguson,

"Twofish: A 128-bit Block Cipher,"

• 15 June 1998. Presented at the 1st AES Conference.
• [Inf, Test, Impl] Bruce Schneier, John Kelsey, Doug Whiting, David Wagner, Chris Hall, Niels Ferguson,
• The Twofish: A New Block Cipher Page,
• "Upper Bounds on Differential Characteristics in Twofish,"
• Twofish Technical Report #1, August 17, 1998.
• "Empirical Verification of Twofish Key Uniqueness Properties,"
• Twofish Technical Report #2, September 22, 1998.
• "On the Twofish Key Schedule,"
• Twofish Technical Report #3, Fifth Annual Workshop on Selected Areas in Cryptography, Springer Verlag, August 1998.
• [Inf] Bruce Schneier, Doug Whiting,
• "Improved Twofish Implementations,"
• December 2, 1998.
• "An Observation on the Key Schedule of Twofish,"
• "Further Observations on the Key Schedule of Twofish,"

Twofish Technical Report #4, March 16, 1999

• "The Key Separation of Twofish," March 15, 2000. Presented at the 3rd AES Candidate Conference.
• "Impossible Differential Attack of Simplified Twofish,"
• October 1999.
• "A Twofish Retreat: Related-Key Attacks Against Reduced-Round Twofish,"
• Twofish Technical Report #6, February 2000.
• Twofish Test Values,
• Key length: Minimum 8, maximum 256, multiple of 8 bits; default 128 bits.
• Block size: 16 bytes.