The "MACHAON-EE" control system is a modified version of the "MACHAON" control system without the ability to assess the security of information technology facilities, and does not contain state secrets.
The completeness and technical characteristics are optimized for conducting search activities of the "MACHAON-EE" control system.
The functional characteristics and composition of the "MACHAON-EE" control system are ideal for conducting search activities to identify channels for leakage of speech information via acoustic and vibroacoustic channels, as well as leaks due to side electromagnetic radiation from the main technical equipment, engineering structures of premises and buildings (such as: sound amplification systems, warning systems, sound systems, pipelines, exhaust ventilation shafts and pipelines) at information technology facilities by measuring direct and indirect acoustic, vibroacoustic and electromagnetic parameters, as well as localizing sources of radio emission.
The Machaon-EE CPA is designed to search for acoustic speech information leakage channels via technical channels.
The operating principle of the Machaon-EE CPA is based on measuring the physical parameters of information leakage channels.
When studying leakage channels, the acoustic speech signal is simulated by a test signal - Gaussian noise (noise mode) or a set of successive tone signals (tone mode) with a calibrated volume level. A UAS is used to reproduce the test signal.
When propagating in the air and interacting with obstacles (walls, windows, electrical appliances, etc.), acoustic signals partially pass through them, forming an acoustic leakage channel, and are partially converted into secondary signals: vibration, electric and magnetic field, electrical interference (voltage and current), which are also potential leakage channels.
To search for leakage channels in places of possible interception or places located closer to the source of the test signal, called control points, measuring sensors (microphone, accelerometer, laser vibrometer, converters of magnetic and electric components of the electromagnetic field, network connection filter, wire line adapter, current collector) are placed. The sensors convert the corresponding signals into electrical signals and transmit them to the input of the UPP. The sensors measure the levels of the dangerous signal (i.e. the signal with the frequency of the test signal) and the background (with the test signal turned off).
For correct measurement, the level of the dangerous signal must exceed the background level, otherwise the measurements are repeated at an increased volume of the UAS or switched to tone mode. The use of information protection equipment (noise generators) during operation is not allowed.
A magnetic field detector is used to localize the signal.
This determines:
a potential information leakage channel; the location of the potential information leakage channel and/or localization of the STS (special technical means);
Then the Machaon-EE CPA determines the signal level assuming that the source has a standard volume. Indication is performed for each octave band with geometric mean frequencies of 125, 250, 500, 1000, 2000, 4000, 8000 Hz.
The results are presented as levels of a dangerous signal and masking noise and expected speech intelligibility at a control point in the leakage channels under study. Based on these data, the operator makes a conclusion about the presence of a STS or a potential channel for leakage of speech information.