On the question of the applicability of the statistics of the measure “chi-square” in the problem of determining the parameters of block encryption algorithms

doi:10.48612/jisp/3p1p-bx2v-prru

On the question of the applicability of the statistics of the measure «chi-square» in the problem of determining the parameters of block encryption algorithms

Applied cryptography

Authors:

Mironkin V. O. Yurasov N. A.

Abstract:

The article presents the results of the practical application of statistical methods for analyzing block encryption algorithms operating in the ECB encryption mode. In particular, in cases of incorrect use of plaintext encoding algorithms, it is established that it is possible to determine the block size of encryption algorithm based on the analysis of chi-square statistics calculated on the available ciphertext volume.