On A Class Pseudo-Dynamic Substitutions PD-Sbox, With A Perfect Averaged Distribution of Differentials in Static Mode of Work

Abstract

Paper present results of the initial analysis of class a pseudo-dynamic substitutions PD-sbox, having a perfect distribution of differentials, when averaged over all possible generated substitutions in static mode of work (in case of work with fixed values of the state of S). Search and further study of cryptographic properties of such substitutions will significantly improve the effectiveness of the pseudo-dynamic substitutions PD-sbox in symmetric crypto algorithms.