A METHOD FOR FORMATION PARAMETERS OF CHAOS GENERATORS BASED ON HASH FUNCTIONS

Abstract

Recently, more and more attention has been paid to the study issues of the properties phenomenon of dynamic chaos, which has penetrated practically all areas of scientific activity, including cryptography, radio-technical transmission systems, etc. Dynamic chaos opens new possibilities for the formation of random sequences that are used in cryptographic systems. Using such sequences, it is possible to solve problems of improving the cryptographic strength of streaming encryption systems. The reason for this is that the properties of dynamic chaos, which, as a rule, apply to gamma sequences: the motion of deterministic dynamic system under certain conditions has all the properties of the noise signal; the presence of nonlinearity and non-periodicity of the process. For the formation of gamma sequences, it is proposed to use software chaos generators, which, in contrast to linear congruent generators, have much a longer period. A characteristic feature of chaos generators is that minor changes in their initial parameters lead to the formation of new values of the oscillations. This allows the formation of various trajectories of the chaotic process, on the basis of which can create almost unlimited number combinations of gamma sequences of a given length. This article proposes a method of forming the initial parameters of program chaos generators based on conversion of the hash function of the password characters of the cryptographic system user