Construction of equivalent linear trails and multiple linear attack on reduced-round GIFT-64.

Autor: Cui, Yaxin, Xu, Hong, Tan, Lin, Chen, Huajin, Qi, Wenfeng
Zdroj: Journal of Cryptographic Engineering; Jun2023, Vol. 13 Issue 2, p223-234, 12p
Abstrakt: To estimate the security of block ciphers against linear attacks, we introduce a kind of word-wise permutation which is used to construct equivalent linear trails from known ones for bit-oriented SPN block ciphers. Particularly, we find such word-wise permutations for GIFT-64, and use one of them to construct equivalent linear trails for 12-round GIFT-64. With five of these linear trails, we further present a 19-round multiple linear attack on GIFT-64 using Flórez-Gutiérrez et al.'s improved key-recovery algorithm. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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