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

  P.A. Chub , D.N. Tsvetkova , N.V. Boldyrikhin , D. A. Korochentsev

  2020-10-11

  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.