FORMALIZATION OF THE STAGE OF SEARCHING FOR MODULATED SIDE ELECTROMAGNETIC RADIATIONS AND INTERFERENCES IN THE PROCESS OF MODELING THE FUNCTION OF INTERCEPTING THESE SIGNALS

The purpose of the article is to dealing with the issues of formalizing the process of unauthorized receipt of computer information by intercepting informative signals of electromagnetic side effects of basic technical means and systems by technical means of intelligence, as well as removing informative signals of interferences on conductive lines of basic technical means and systems by technical means of intelligence. The article describes the procedure for formalizing the first stage of the process of intercepting informative signals of basic technical means and systems by technical means of intelligence – the stage of searching for signals of electromagnetic side effects and interferences modulated by such signals. The results of the functional decomposition of this stage to the level of procedures performed by the violator for the use of technical intelligence tools in the process of searching for signals of side electromagnetic radiation and interferences modulated by informative signals of the main technical means and systems are presented. The procedure for performing these procedures is described in terms of functional diagrams. The transition from the representation of the studied processes in the form of functional diagrams to the representation in the form of Markov processes is illustrated. Mathematical expressions are given to determine the time characteristics of tasks solved in the process of searching for electromagnetic side effects and interference signals modulated by informative signals of the main technical means and systems.