Мобільний засіб блокування витоку інформації акустичними каналами

Abstract

The article develops a device for protecting acoustic (speech) information from unauthorized access is proposed, the device is based on the effect of sound masking. The device allows to block the leakage of speech information by creating noise. The developed device consists of a telephony and a noise player blocks. Telephony is realized by means of a set of microphone amplifiers for communication of two subscribers and the output amplifier which outputs are connected to the head telephones of subscribers. The playback block consists of a two-channel power amplifier with a variable gain and has the ability to adjust the volume of noise, the output of the amplifier is connected to the built-in speaker. A feature of the device is that the source of noise signals is an external multimedia device, which plays a pre-recorded audio file that contains noise, rather than the built-in noise generator. This approach allows for the flexibility of output audio interference, including various types of noise and fake conversations. The possibility of modular construction of the device allows to provide, in addition to the obvious simplification and reduction of manufacturing costs, also relative versatility, and the advantages of an external signal source - a wide range of applications on real objects of information activities. The developed device was modeled in a CAD software, which confirmed its functionality and ability to perform the stated tasks, and as a result, a prototype was developed, which demonstrated performance in real conditions of use. The implementation of the elements of this device with the help of computer technology, in particular multimedia devices and available components makes it an affordable and effective means of solving problems of technical protection of information. In addition, the device is easy to set up and comprehensible for users, which allows you to use it not only to protect information, but also in educational and scientific processes