Impossible Differential Cryptanalysis for SPN Cipher Structure and Advanced Encryption Standard

Abstract

In this correspondence, we examine the security of block ciphers referred to as substitution-permutation networks (SPN) by considering the impossible differential characteristics of given S-boxes. When the SPN has 2-round, we obtain a new upper bound on the maximum impossible differential probability MIDP. Moreover, when using a recursive technique, we… (More)

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