Advanced Method of Protection of Confidential Information From Interception by High-Frequency Imposition Methods

Abstract

The processes of formation of technical channels of leakage of confidential information on objects of information activity by methods of high-frequency imposition, physical essence of process of formation of dangerous signals by modulation of probing high-frequency signal by acoustic signals, conditions of formation of basic and auxiliary technical means and systems of dangerous signals are considered. As a basis for improvement, a method of blocking information interception channels by high-frequency imposition is used, in which target active noise protection signals are introduced into the medium used to supply probing oscillations, aimed at destroying informative parameters of dangerous signal with different types of carrier modulation. It is proposed to form a set of protective signals for the destruction of informative parameters of dangerous signals both on the fundamental frequency and on the combinational harmonics of the probing signal, which provides more effective protection of confidential information from interception. The parameters of effective noise protection signals, capable of destroying the informative parameters of dangerous signals of high-frequency imposition on the fundamental frequency and combinational harmonics of the probing signal, have been determined by mathematical and simulation modelling. Basic recommendations for the formation of protective signals are formulated.