Technical Report CS0947

Title: Cryptanalysis of Skipjack Reduced to 31 Rounds using Impossible Differentials
Authors: Eli Biham, Alex Biryukov, Adi Shamir
PDF - RevisedCS0947.revised.pdf
Abstract: In this paper we present a new cryptanalytic technique, based on impossible differentials, and use it to show that Skipjack reduced from 32 to 31 rounds can be broken by an attack which is faster than exhaustive search.
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