Перегляд за Автор "Turchyn, Andrii"

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    Refined Method of Impossible Differentials Search with Application to Kalyna-Like Ciphers
    (Igor Sikorsky Kyiv Polytechnic Institute, 2025) Turchyn, Andrii; Yakovliev, Serhii
    This work addresses the problem of evaluating the security of block ciphers against impossible dif-ferential cryptanalysis, with a particular focus on Kalyna-like ciphers. Based on formalized meth-ods —specifically the Wu-Wang method — this work introduces refined rules tailored to AES- andKalyna-like ciphers. These refinements simplify compatibility checks by replacing large systems oflinear equations with computationally efficient conditions. Experimental results have identified severalclasses of impossible differentials for three-round versions of certain Kalyna cipher variants, therebydemonstrating the security of full-round ciphers against this method of cryptanalysis