Upper Bounds on Differential Characteristics in Twofish

Published: Apr 04, 2000
Updated: Apr 04, 2000
Section: Network Security Library :: Cryptography
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In our original paper, the Twofish block cipher was introduced, and initial estimates of an upper bounds on the probability of a 12-round differential were given. These results used an imperfect model of Twofish. We present an improved model, and show that any 12-round differential characteristic has a probability of at most 2-102.8.

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