Security Evaluation of a Brute-force Attack on a Cipher Using a Statistical Criterion for Plaintext

Resumo

The paper presents calculations of the amount of effort and the reliability of the method of brute-force attack on a cipher using a statistical criterion for plaintexts, which has type 1 and type 2 errors. Calculated values of parameters of the discussed cryptanalysis methods for a cipher allows better predictions of its remaining safe operational life taking into account statistical characteristics for recognizing the plaintext and changes in the communication channel parameters.