APPARATUS FOR DETECTING THE FACT OF AN ATTEMPT TO OBTAIN UNAUTHORISED ACCESS TO SPEECH INFORMATION USING LASER ACOUSTIC RECONNAISSANCE SYSTEMS Russian patent published in 2021 - IPC H04K3/00 

FIELD: information security.

SUBSTANCE: invention relates to the field of technical protection of information, in particular, to means of detecting the fact of an attempt to obtain unauthorised access to speech information. The apparatus for detecting the fact of an attempt to obtain unauthorised access to speech information using laser acoustic reconnaissance systems operating in the ultraviolet wavelength range includes a light-transmitting and scattering window glass cover. Said cover constitutes a curtain film with fluorescent pigment spots. The area of each one is equal to at least one square centimeter, and the maximum possible linear size of the light-transmitting and scattering surface of the film free from spots with the fluorescent pigment does not exceed one centimeter, thus providing a possibility of detecting the fact of an attempt to obtain unauthorised access to speech information.

EFFECT: provided possibility of detecting the fact of an attempt to obtain unauthorised access to speech information using laser acoustic systems operating in the ultraviolet wavelength range.

1 cl, 1 dwg