ASSESSMENT OF THE USE OF ELECTROMAGNETIC RADIATION SOURCES AS A SIGNAL SOURCE IN A TECHNICAL LEAKAGE CHANNEL (TEMPEST)

This study aims to develop a method for evaluating components of technical systems as signal sources (electromagnetic radiation — EMR) based on their effectiveness as a signal source in a technical leakage channel (TEMPEST). The relevance of the work stems from the lack of approaches to assessing the effectiveness of technical system components as EMR sources in organizing TEMPEST channels, considering both experimental and theoretical data on EMR sources. This leads to suboptimal allocation of protective measures due to the absence of a method for determining priority threats. To solve this problem, a combined assessment method based on solving a multi-criteria problem (using the ideal point method) is proposed. The result is an assessment of the efficiency of EMR sources using experimental data on channel length and bandwidth, and theoretical calculations of electric field strength. The proposed solution enables obtaining coefficients for ranking technical system components by their effectiveness as signal sources in TEMPEST channels. The results pertain to information technology security and can be applied in developing organizational and technical measures aimed at protecting information from leakage via TEMPEST channels due to EMR.