ESTIMATION OF SECURITY OF THE PREMISES FROM LEAKAGE OF SPEECH INFORMATION IN CONDITIONS OF EXPOSURE TO NOISE

Abstract

The article discusses the features of the application of certification methods for protected premises. Such techniques are developed and regulated by the Federal Service for Technical and Export Control. The need for certification is associated with the presence of technical channels for information leakage, through which an attacker can obtain information constituting a commercial, state or other secret. The presence of technical channels for information leakage is due to physical processes associated with the propagation of acoustic, electromagnetic, and optical waves. Through such channels, leakage of acoustic, specific information, information processed by technical means and systems is possible. In the framework of this work, the features of certification of protected premises against leakage of acoustic information are considered. Certification includes instrumental measurements that allow you to detect an informative signal in communication lines, on the air, in heating, water supply, ventilation, etc. In addition to measurements, certification involves calculations based on which a conclusion is made about the conformity or noncompliance of the level of protection. The calculation part is rather cumbersome and complex, therefore the purpose of the work is to develop an algorithm that allows you to determine the degree of security of the selected premises from the leakage of speech information. The objectives of the work are: the development of auxiliary algorithms for calculating the security parameters of the room for each type of voice information leakage channel; implementation of software that allows you to determine the degree of security of the room; conducting a study of the dependence of room security on the noise level using the developed software. As the results of the work, the synthesized algorithm and the developed software tool should be noted, which can significantly reduce the time for the procedure for assessing the security of the room and avoid errors. The result of the work is the study of the dependence of verbal intelligibility of speech on the noise level in various octaves. Studies have shown that verbal intelligibility, which determines the security of a room by acoustic parameters, decreases non-linearly with an increase in the noise level at a fixed signal level.