The New Cryptographic Method for Software and Hardware Protection of Communication Channels in Open Environments

Abstract

The chapter is devoted to presenting theoretical bases and features of practical realization the new cryptographic method for software and hardware protection of communication channels in open environments. In the theoretical part of the chapter is shown the possibility of modeling the modes of deterministic chaos in the oscillations of discrete structures formed in the form of special matrix forms of the Latin square. A mathematical model is proposed for such discrete systems, on the basis of which an analysis of the combination of conditions for discrete structures and the requirements for transformations of their evolution operators ensuring the achievement of such modes is carried out. The results of simulation modeling of oscillatory processes according to the cycles of states of a discrete system, forming similarities of attractor trajectories, are presented. The possibility of simulating oscillation beat modes in discrete cellular structures organized in the form of two-level matrix forms of Sudoku grids is substantiated. The results of simulation modeling of oscillation beats in cycles of varying states of a discrete system for two types of beats are presented: similar to the result of the superposition of harmonic oscillations at multiple frequencies in the theory of radio signals, as well as noise-like beats. Analyzed the principles of creating devices to implement a closed communication channel in an open data transmission environment. To solve the protection problem, it is proposed to use the AES standard cryptographic algorithm, supplemented by the author’s system of dynamic generation of encryption keys. Is presented the description of the system for generating encryption keys, which based on the combinatorial properties of matrix structures in the Sudoku grids form. Are shown the results of external software testing of cipher text code sequences and computer tests of the proposed algorithm. Using the modified AES cryptographic algorithm, a working model of the system for protecting a remote control of a mobile object over the radio channel has been built.