New Multiple Linear Cryptanalysis of Block Ciphers
Deukjo Hong, Jaechul Sung, Sang-Jin Lee, Seokhie Hong · Information Security and Cryptology · 2007
Multiple linear cryptanalysis has been researched as a method building up the linear attack strength. We indicate that the lastest linear attack algorithm using multiple approximations, which was proposed by Biryukov et al. is hardly applicable to block ciphers with highly nonlinear key schedule, and propose a new multiple linear attack algorithm. Simulation of the new attack algorithm with a small block cipher shows that theory for the new multiple linear cryptanalysis works well in practice.