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On the Twofish Key Schedule
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On the Twofish Key Schedule
Bruce Schneier5  , John Kelsey5 , Doug Whiting6 , David Wagner7 , Chris Hall5 and Niels Ferguson5
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Counterpane Systems, 101 E Minnehaha Parkway, Minneapolis, MN 55419, USA |
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Hi/fn, Inc., 5973 Avenida Encinas Suite 110, Carlsbad, CA 92008, USA |
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University of California Berkeley, Soda Hall, Berkeley, CA 94720, USA |
Abstract
Twofish is a new block cipher with a 128 bit block, and a key length of 128, 192, or 256 bits, which has been submitted as
an AES candidate. In this paper, we briefly review the structure of Twofish, and then discuss the key schedule of Twofish,
and its resistance to attack. We close with some open questions on the security of Twofish’s key schedule.
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