Fast algorithm for computation the parameters of s-boxes that determine the security of SNOW 2.0-like stream ciphers against correlation attacks over extension fields

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Дата

2021

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Видавець

Igor Sikorsky Kyiv Polytechnic Institute

Анотація

The security of SNOW 2.0-like stream ciphers against a wide class of correlation attacks can be evaluated by values of some numerical parameters of s-boxes used in these ciphers. We propose a fast algorithm that computes the values of these parameters. The proposed algorithm is based on the fast Hadamard transform and has significantly lower time complexity compared to the previously known ones. We also show experimentally, using the Monte Carlo method, that for most random 8 x 8 s-boxes the values of the considered parameters ensure an appropriate security level of SNOW 2.0-like stream ciphers against known correlation attacks.

Опис

Ключові слова

algorithmic cryptanalysis, SNOW 2.0-like stream cipher, correlation attack, security evaluation, fast Hadamard transform, SNOW 2.0, STRUMOK

Бібліографічний опис

Poremskyi, M. Fast algorithm for computation the parameters of s-boxes that determine the security of SNOW 2.0-like stream ciphers against correlation attacks over extension fields / Mykhailo Poremskyi // Theoretical and Applied Cybersecurity : scientific journal. – 2021. – Vol. 3, Iss. 1. – Pp. 52–57. – Bibliogr.: 11 ref.