New Methods for Bounding the Length of Impossible Differentials of SPN Block Ciphers

ePrint Report: New Methods for Bounding the Length of Impossible Differentials of SPN Block Ciphers

Senpeng Wang, Dengguo Feng, Bin Hu, Jie Guan, Ting Cui, Tairong Shi, Kai Zhang

Impossible differential (ID) cryptanalysis is one of the most important cryptanalytic approaches for block ciphers. How to evaluate the security of Substitution-Permutation Network (SPN) block ciphers against ID is a valuable problem. In this paper, a series of methods for bounding the length of IDs of SPN block ciphers are proposed. …

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