On differentials for the modification of the cipher Simon based on the Lai - Messi scheme | Applied Discrete Mathematics. Supplement. 2020. № 13. DOI: 10.17223/2226308X/13/35

On differentials for the modification of the cipher Simon based on the Lai - Messi scheme

We consider the block iterative cipher Simon based on the Feistel network and its modification based on the Lai - Messi scheme. Received estimates of differentials of the considered ciphers are compared. The results show that after 12 rounds, estimate of the maximum probability of a differential for the modified cipher Simon 32/64 without adding an ortho-morphism is 2^-24, and with the addition of orthomorphism is between 2^-24 and 2^-63, while the estimate of maximum probability for the original version is 2^-36.

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Keywords

схема Лая, Месси, Lay, Massey scheme, еть Фейстеля, дифференциальный криптоанализ, Feistel network, differential cryptanalysis

Authors

Name	Organization	E-mail
Belousova A. A.	S. L. Sobolev Institute of Mathematics SB RAS; Novosibirsk State University	alinkabel18@gmail.com
Tokareva N.N.	S. L. Sobolev Institute of Mathematics SB RAS; Novosibirsk State University	tokareva@math.nsc.ru

Всего: 2

References

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Biham E. and Shamir A. Differential Cryptanalysis of the Data Encryption Standard. Berlin; Heidelberg: Springer, 1993.