V. M. Fomichev, A. V. Kurochkin, A. B. Chuhno, “The difference relations and impossible differentials construction for the KB-256 algorithm”, ПДМ. Приложение, 2022, выпуск 15,страницы 73

Математические методы криптографии

The difference relations and impossible differentials construction for the KB-256 algorithm

V. M. Fomichev^abc, A. V. Kurochkin^ad, A. B. Chuhno^ea

^a "Security Code", Moscow
^b Federal Research Center "Computer Science and Control" of Russian Academy of Sciences, Moscow
^c Financial University under the Government of the Russian Federation, Moscow
^d Moscow Institute of Physics and Technology (National Research University), Dolgoprudny, Moscow Region
^e National Research University "Higher School of Economics", Moscow

Аннотация: In this paper, new results of the analysis of the KB 256-3 block cipher algorithm are outlined. We set up a difference relation with probability 1 for the six-round algorithm under study and propose a key recovery method using this difference relation for the nine-round KB 256-3 algorithm. We construct an impossible differential for the full-round algorithm.

Ключевые слова: differential cryptanalysis, impossible differentials.

УДК: 519.17

Язык публикации: английский

DOI: 10.17223/2226308X/15/19