Design of substitution nodes (S-Boxes) of a block cipher intended for preliminary encryption of confidential information
Khompysh A. Kapalova N. Algazy K. Dyusenbayev D. Sakan K.
2022Cogent OA
Cogent Engineering
2022#9Issue 1
This paper considers a new method for obtaining an S-box, which is one of the nonlinear transformations used in modern block-symmetric cipher systems. This method is based on modular arithmetic, that is, exponentiation modulo polynomial in extended Galois fields (Formula presented.). The indicators and criteria of efficiency of the obtained S-box (balance, Hamming distance, distribution criteria, autocorrelation, algebraic immunity, cyclic structure of the S-box) are analyzed. The cryptographic characteristics are presented in comparison with the substitution boxes of known modern block ciphers. In addition, the resulting S-box was investigated by the methods of linear and differential cryptanalysis. In the future, the proposed S-box will be used in the developed encryption algorithm designed for the pre-encryption of confidential information.
algebraic immunity , block ciphers , Boolean functions , linear and differential cryptanalysis , nonlinear transformation , S-box , strict avalanche criterion (SAC)
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Institute of Information and Computational Technologies of the RK MES CS, Kazakhstan
Al-Farabi Kazakh National University, Almaty, Kazakhstan
Institute of Information and Computational Technologies of the RK MES CS
Al-Farabi Kazakh National University
10 лет помогаем публиковать статьи Международный издатель
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