International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 13 September 2013

Oleksandr Kazymyrov, Valentyna Kazymyrova, Roman Oliynykov
ePrint Report ePrint Report
Criteria based on the analysis of the properties of vectorial Boolean functions for selection of substitutions (S-boxes) for symmetric cryptographic primitives are given. We propose an improved gradient descent method for increasing performance of nonlinear vectorial Boolean functions generation with optimal cryptographic properties. Substitutions are generated by proposed method for the most common 8-bits input and output messages have nonlinearity 104, 8-uniformity and algebraic immunity 3.

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