The protection device voice information from unauthorized removal
The invention relates to techniques for optical communication and is designed to protect the voice data from eavesdropping. The technical result consists in increasing the efficiency of protection of verbal information from unauthorized access. For this purpose, in the device containing the continuous laser radiation, power supply and case, entered the photodetector, amplifier, control unit, generator, speech-like signals, an optical modulator and forming an optical relay system. 2 Il. The proposed technical device relates to the field of optics, in particular to devices for the protection of verbal information from eavesdropping and recording using laser acoustic location systems.Known devices intended to protect speech information in the premises in which the window glass serves oscillations with amplitude, clearly exceeds the amplitude of the vibrations of the human voice (see, for example, “Spy stuff” and device for protection of objects and information. Reference book /Ed. by S. Zolotarev A. - S.-Pb.: The DOE. 1996, S. 134-135).The disadvantages of such devices are mainly in the so-called “acoustic white noise” eno is C the remaining part of the spectrum of acoustic noise using the decomposition in amplitude and frequency quite easily distinguished modulating oscillations, inherent in the voice of a man.Also known device using the laser, creating noise sasvetochka interference photodetector laser acoustic locating system. In such devices the laser radiation is directed onto the reflective surface of the premises so that the reflected signal from them was much higher than the amplitude of the reflected laser signal to the listening device (see Review active technical means of information protection), 1997, No. 6, S. 61-63).The closest proposed device is a laser device interference, described in the book Khoreva A. A. Ways and means of information protection. - M, defense Ministry, 1998, S. 69-70, 79, adopted as a prototype.In Fig.1 shows a functional diagram of the device of the prototype showing: 1 - continuous laser radiation; 2 - power supply; 3 - case.The device prototype has the following functional relation.In case 3 is rigidly fixed to the continuous laser radiation 1 and power supply 2.The device prototype works as follows.At the time of the exchange of information enables the continuous laser radiation 1. Facing the laser beam is directed on box in a wide angle, covering practically the entire polusobrannom laser acoustic location systems (RTLS). Because the amplitude of this total signal exceeds the amplitude of the “listening” signal, that is “light-sensitive layer of the sensor and it does not provide useful (listening) signals.The drawback of the prototype is that to ensure reliable suppression of the photodetector laser acoustic locating system requires a lot of power laser radiation, making it unsafe for people (your eyes), being in the room.In addition, the continuous (CW) laser operation is not economically profitable.Objectives of the invention are: enhancing the protection of verbal information from unauthorized access; reducing the cost of protecting the premises from unauthorized eavesdropping.Solving these problems is achieved that the device containing the continuous laser radiation, power supply and case, entered sequentially electrically connected to the photodetector, amplifier, control unit, generator, speech-like signals, an optical modulator and forming an optical relay system. Optical input of the modulator is connected to the output of the laser continuous theme. One output of the control unit is electrically connected to the input of the continuous laser radiation, and the second output from the generator input speech-like signals. The generator output is speech-like signals is connected to the electrical input of the optical modulator.The inclusion of these elements will improve the efficiency of the detection laser irradiation areas, creating a listening device laser noise speech-like signals and thereby to protect the premises from unauthorized retrieval of verbal information.In Fig.2 shows a functional diagram of the proposed device, where we have introduced the following notation: 1 - photodetector; 2 amp; 3 - generator speech-like signals; 4 - control unit; 5 - power supply; 6 - forming a transmitting optical system; 7 - optic modulator; 8 - continuous laser radiation; 9 - case.The proposed device has the following functional relationships. The output of the photodetector 1 is electrically connected to the input of the amplifier 2, the output of which is electrically connected through the series-connected control unit 4 and the generator speech-like signal 3 to the input of the optical modulator 7. The input of the photodetector 1 is simultaneously input device. Posledovatelno optically connected with the optical modulator 7 and forming a transmitting optical system 6, which is the output device.The output of the power supply unit 5 is electrically connected to the inputs of a sensor 1, an amplifier 2, a control unit 4, the generator speech-like signals 3, continuous laser radiation 8 and the optical modulator 7.The proposed device operates as follows.When detected by the photodetector 1 of the laser radiation in the control unit 4 produces the signal. One signal generator includes a speech-like signal 3, which is coming to an optical modulator 7. The signal from the second output control unit 4 includes a continuous laser radiation 8. The laser beam 8 passing through the optical modulator 7, modulated according to the law of the generator speech-like signals 3 and is directed to forming a transmitting optical system 6. The output form of the transmitting optical system 6, the beam is formed with a predetermined pattern and is radiated onto the reflecting surface of the window glass. The laser light modulated sound (speech) frequency, captured by the receiver laser acoustic locating system, resulting in concealment of the true speech signal (voice data).Introduction in the device consistently electr what about the modulator and forming an optical transmission system provides a stable, operational protection of premises against unauthorized retrieval of verbal information.Implementation of the proposed device is straightforward, as all the separate blocks and nodes included in it is well-known, widely described in the technical literature and can be used when implementing the proposed device without additional development.
ClaimsThe protection device voice information from unauthorized removal, comprising a housing, a power supply, the continuous laser radiation, characterized in that it additionally introduced sequentially electrically connected to the photodetector, amplifier, control unit, generator, speech-like signals, an optical modulator, as well as forming the transmitting optical system, while the second output control unit electrically connected to the input of the continuous laser radiation, optical output through which an optical modulator is connected to the input of forming a transmitting optical system, the output of which is the output device and the power unit is connected to the input of the optical modulator of the continuous laser radiation, generator speech-like signals, a control unit, Wuxi
FIELD: technologies for preventing interception of data.
SUBSTANCE: transferred signal is concealed via adding noises to communication line in speech frequency range with linear addition of speech data signal with noise signal of higher level. Concealment is removed via adaptive filtration of received signal with compensation of noise component and separation of data component. Addition of noises to communication line is performed from the side of sensor. Noise signal during addition of noises and adaptive filtration is formed of a sum of counts of several noise series with nonevent sizes via their random querying. At the beginning of each communication session a signal is sent to side of receiver, characterizing order of querying of series, and starting signal, providing for synchronism of noises addition and filtering processes. All operations are performed by means of microprocessors, mounted on both sides of communication line, dependently of loaded software providing for change of direction of transmission and protection of speech data signal. Invention allows to simplify protection while providing for absolute confidentiality of transmitted data.
EFFECT: higher reliability.
6 cl, 4 dwg
FIELD: radio engineering; secret intelligence protected radio communication systems.
SUBSTANCE: proposed radio communication system incorporating provision for suppressing enemy's radio communication means and radio control channels has information subsystem, noise jamming subsystem, noise memory subsystem, information subsystem elements, and subsystem elements interface unit; each element of information subsystem is made in the form of multichannel time-division radio station; each element of noise jamming subsystem is made in the form of time division multichannel radio station, and each of noise jamming subsystem elements is made in the form of barrage jamming transmitter built around noise signal generating driver; used as drivers are self-stochastic generator operating in different frequency bands.
EFFECT: enhanced intelligence protection of communication channels, simplified design, enhanced reliability.
2 cl, 13 dwg
FIELD: methods for protection of an active radar against antiradar missiles.
SUBSTANCE: in the method and device for protection of radar against antiradar missiles accomplished are radiation of sounding signals, detection of antiradar missiles, guidance of anti-aircraft missiles on the antiradar missile, destruction of the anti-radar missile by blasting of the warhead of the anti-aircraft missile, guidance of the anti-aircraft missile at least during a time period directly preceding the blasting of the warhead of the anti-aircraft missile, all this is conducted on the trajectory passing in the vicinity of the imaginary line connecting the antiradar missile and the radar, in this case constantly are determined the distance from the radar to the antiradar missile Dr-arm, from the radar to the anti-aircraft missile Dr-aacm and from the anti-aircraft missile to the antiradar missile Daacm-acm, and at the time moments leading the moments of radiation of the radar sounding signal by value t=(Dr-aacm+Daacm-arm-Dr-arm)/v, where v - velocity of light, commands are given from the radar to the anti-aircraft missile for radiation of a signal simulating the radar signal.
EFFECT: reduced dynamic errors of guidance of anti-aircraft missile on antiradar missile.
3 cl, 6 dwg
FIELD: espionage protection techniques.
SUBSTANCE: method includes serial scanning of target surface by nonlinear locator, recording and processing received response in PC with displaying of positions of semiconductor devices. In case of appearance of response on target surface on command from PC visible laser is enabled, response points are lighted by it, pictured using digital camera and recorded in PC. Responses are process in conjunction with target surface image and integral picture of responses is built. On basis of received picture additionally visually detected are potentially possible places for placing semiconductor devices, and also trajectories of tracing of communications on target surface, structures of inbuilt metal construction and anomalies in said structures.
EFFECT: higher precision, higher efficiency, broader functional capabilities.
FIELD: radio communications.
SUBSTANCE: system has transmitting portion, which contains clock pulse generator 1, first and second D-code generators 21-22, first and second generator of double frequency manipulation 31-32, adder 4, modulator 5, frequencies synthesizer 6, pseudo-random numbers generator 7. said portion is connected through broadcast line 8 to receiving portion, which has demodulator 9, frequencies synthesizer 10, pseudo-random numbers 11, signals selector 12, clock pulses generator 13, block for selecting additional series 14, block for folding additional series 15, solving block 16. new set of significant features provides for possible implementation of distributed receipt with code structure of specific orthogonal quadruple-encoded series without expansion of available frequency resource.
EFFECT: broader functional capabilities, higher trustworthiness, higher efficiency, higher interference resistance.
2 cl, 5 dwg
FIELD: radio engineering, possible radio-technical reconnaissance of radio-electronic means of enemy.
SUBSTANCE: radio-technical reconnaissance station contains antenna device 1, receiver 2, bearing device 3, analyzer 4 of received signal parameters, device 5 for memorizing and processing received information, telemetric device 6, receiving antennae 7-9, block 10 for readjustment, first 11 and second 23 heterodynes, mixers 12-14 and 24, amplifiers 17-19 of first intermediate frequency, detector 20, first 21 and second 31 delay lines, key 22, amplifier 25 of second amplification frequency, multipliers 26,27 and 30, narrowband filters 28,29 and 32, phase detector 33, phase meters 34 and 35, engine 15 and supporting generator 16.
EFFECT: expanded area of reconnaissance and increased number of detected radio-electronic means due to positioning of radio-technical reconnaissance station onboard the helicopter.
FIELD: technology for generating artificial interference for concealing electromagnetic channels leaking speech information.
SUBSTANCE: in accordance to invention, method includes generation, amplification and emission of concealing noise signal, and also substantial changes and additions, namely: noise signal is amplified in mode B or AB, pulse automatic-compensating stabilization of power amplifier powering voltage is utilized, stabilized voltage is filtered by upper frequencies filter, lower limiting frequency is higher than upper frequency of audible spectrum, but lower than frequency of pulse stabilizer.
EFFECT: increased efficiency of method while power for concealed equipment is delivered by industrial alternating-current network.
FIELD: radio engineering, namely, equipment for generating artificial interference, possible use for protecting information from leaking along vibro-acoustic channel from a room.
SUBSTANCE: in accordance to method for protecting speech information along vibro-acoustic channel, interference is generated for masking speech signal, while interference is formed as M-series of pulses with following transformation, while transformation of M-series of pulses is performed in form of generation of vibration impact signals, by which speech signal is multiplicatively masked, while M-series of pulses is generated from period to period in accordance to random rule.
EFFECT: increased efficiency of technical means for information protection, decreased acoustic radiations, interfering with negotiations, radiations, affecting operation of nearby radio-electronic means, and also disclosing a structure of noise interference, decreasing probability of it being filtered.
FIELD: engineering of equipment for counteracting commercial and industrial espionage.
SUBSTANCE: device includes auxiliary transmitting-receiving antenna, antenna commutator, controllable interference generator, radio radiation detector and additional generator of interference with individual antenna. Launch circuit of controllable interference generator is connected to of radio radiation detector. The latter is made with possible recording of beginning of emission of radio interface of cell phone during its communication with external device, determining presence and frequency channel of unsanctioned communication with radio interface and adjustment of frequency of controlled interference generator. Commutator is enabled with possible switching of auxiliary antenna from input of radio emission detector to output of controllable interference generator for suppressing unsanctioned data transfer through radio interface. Output of radio radiation detector is connected to controlling inputs of commutator and controlled interference generator. For additional interference generator, mode of permanent generation of interference is set in radio spectrum of global positioning systems, excluding capability for determining coordinates of cell phone.
EFFECT: increased efficiency of cell protection from unsanctioned pickup of information from radio interface with reliable suppression of attempts of determining current location of cell phone.
3 cl, 1 dwg
FIELD: technology for creating artificial interference for masking speech information in industrial network of alternating current.
SUBSTANCE: device (dwg. 1) contains rectifier 2 and, connected serially, noise signal generator 4, noise signal power amplifier 5 and emitter 6, in noise signal amplifier 5, mode B or AB is implemented, between rectifier 2 and power chain of noise signal generator 4 and power amplifier of noise signal, impulse automatic-compensation voltage stabilizer 8 is inserted, at output of which upper frequency filter is mounted, lower cut frequency of which is higher than upper frequency of audible spectrum, but lower than clock frequency of impulse automatic-compensation voltage stabilizer 8.
EFFECT: increased protection of sound amplification equipment from possible electromagnetic leakage of sound information along power chains.