KR200424396Y1 - Dual random noise generation and line monitoring function of laser tapping prevention device - Google Patents

Abstract

The present invention is provided to solve the problems of using the conventional laser tapping device to prevent the type of tapping attack that emits a laser beam from the outside of the building for the purpose of tapping the voice of the conversation in a certain space, random number It is equipped with double random noise generating circuit to generate unspecified noise by generating program, and a line monitoring circuit for monitoring the line between the random number noise generating circuit and the transducer which radiates the generated noise on the window surface. It features.

In other words, by mixing two unspecified noise sources generated by the random number generation program and radiating them on the window surface, it becomes impossible or delayed to decode the original voice to the counterpart of the eavesdropping. The line monitoring between the attached transducers detects disconnection and short circuit and transmits them to be displayed on the PC monitor of the control center in real time to manage the normal operation of the laser eavesdropping device and to facilitate maintenance. In providing a circuit.

Power supply unit 1, power supply unit 2, random noise generating circuit 1, random noise generating circuit 2, amplifier circuit, line monitoring circuit, transmission circuit, receiving circuit, signal conversion circuit, lamp, buzzer, vibrator

Description

Dual random noise generation and line monitoring function of laser wiretap prevention device {DUAL RANDOM GENERATOR & LINE DETECT FOR LASER TAPPING DEFEAT SYSTEM}

1 is a block diagram showing the configuration of the laser wiretap prevention device load line abnormality detection transmission device of the present invention.

Figure 2 is a block diagram showing the configuration of a signal conversion device for receiving the transmitted signal of the present invention

Figure 3 is a block diagram showing the configuration of the subject innovation

(Explanation of symbols for the main parts of the drawing)

11: Power supply unit 1 12: Random noise generating circuit 1 13: Random noise generating circuit 2

14: amplifier circuit 15: line monitoring circuit 16: transmission circuit

17: Lamp 18: Buzzer 19: Reception circuit

20: signal conversion circuit 21: power supply 2 22: control PC monitor

23: vibrator

The present invention relates to a device for preventing laser tapping in a certain space, and specifically, to intercept indoor conversations by firing a laser beam from the outside without hiding a separate tapping device inside a predetermined indoor space. In this case, the present invention relates to a laser wiretap prevention device which is integrally provided with a function for disturbing the decoded voice from being intercepted by the counterpart and a function for monitoring the normal operating state of the load vibrator.

Recently, with the development of communication technology, eavesdropping technology has evolved to listen to the contents of indoor conversations and telephone conversations of specific companies or individuals. Such eavesdropping is usually a method of directly and indirectly transmitting and receiving contents of a call voice on a wired communication line or a voice signal and data on a wireless communication through a wireless transmitter, etc. This is common.

However, a high level of eavesdropping technology has been provided that allows eavesdropping from the outside without installing a separate tapping device in the room where you want to eavesdropping. The internal wave is a method that uses a small wave generated in the glass window by vibrating the glass window in the room, by emitting a laser beam from the outside of the building to detect the wave of the glass window and converts the detected signal into a voice signal.

The development of such eavesdropping devices is likely to be abused by individual invasion of privacy, commerce, crime, etc. Therefore, there is a need for countermeasures. Accordingly, a wiretap detection device and an eavesdropping device have been provided so that various eavesdropping conditions can be known. .

In the configuration of an example of a conventionally known eavesdropping detection and prevention device, a wireless eavesdropping device includes a high frequency receiver having a plurality of reception antennas to receive a high frequency range, and a radio wave of a specific frequency received by the high frequency receiver. There is an alarm processing unit configured to generate an alarm by operating a buzzer or a lamp to the signal. The conventional wireless eavesdropping device having such a configuration is a device that can determine the current eavesdropping state by operating a lamp or a buzzer when a radio frequency signal emitted from the eavesdropping transmitter is detected through an antenna.

In addition, in the configuration of an example of a conventionally known laser wiretap prevention device, when a predetermined power is applied through a power supply unit, a noise generating unit generating noise in a voice band, an amplifying unit and several oscillators configured to amplify it are attached to the window surface. When operating in the pre-set state, the noise emitted from the vibrator vibrates the window glass, thereby disturbing the voice of the conversation in the room and preventing or delaying the decoding of the intercepted voice.

The conventional laser wiretap prevention device as described above adopts a simple radiation function by continuously generating unspecified noise of a voice band for preventing laser wiretap, so that the voice of the other party can be easily decoded or the noise is emitted. If the line between the laser tapping devices is disconnected or short-circuited, the laser tapping prevention function is disabled.

Accordingly, the present invention has been devised in view of the above-described problems, and includes two random noise generation circuits 1 [12] and two random noise generation circuits 2 [13] that generate unspecified noise by a random number generation program. The noise is doubled to make the decoding more difficult, and the line monitoring circuit [15] is provided between the amplifying circuit [14] and the vibrator [23] so that the line is immediately detected in the event of a disconnection or short circuit, and then the public telecommunication network (PSTN) and the local area network By displaying abnormal signal on the control PC monitor [22] located at the remote location using LAN, it can bring the best equipment operation effect and convenience of maintenance.

Referring to the accompanying drawings the configuration of the subject innovation for achieving the above object in detail as follows.

A random noise generating circuit 1 [12] and a random noise generating circuit 2 [13], which generate unspecified noise in a voice band by a random number generating program, are provided and mixed in two random noise generating circuits. A laser interception prevention device comprising an amplifying circuit (14) for amplifying specific noise and a vibrator (23) for radiating noise, comprising a line monitoring circuit (15) provided between the amplifying circuit (14) and the vibrator (23). It is characterized in that it comprises a transmission circuit (16) for detecting when the wire is disconnected and short-circuited and transmitting the signal to the signal conversion apparatus using the public telecommunication network (PSTN) and the local area network (LAN). The abnormal signal generated at 15 is alarmed by the lamp [17] and the buzzer [18].

In addition, the signal transmitted from the transmission circuit 16 using the public telecommunication network (PSTN) and the local area network (LAN) is received by the receiving circuit [19] of the signal conversion apparatus and the signal is converted by the signal conversion circuit [20]. The data is converted into data and displayed on the control PC monitor [22].

Each of the above components consists of a power supply unit 1 [11] and a power supply unit 2 [21] to supply an appropriate voltage.

As described above, the present invention is a method of intercepting indoor conversation contents from outside by using a laser beam without installing a tapping device in the interior space, which continuously radiates relatively simple unspecified noise to a window to delay decoding. Disturbance function is equipped with two noise generating circuits, and the noise is mixed in double to radiate on the surface of the window, making it impossible to decipher during laser tapping attack or delaying. By detecting this in case of short circuit, it can be detected remotely, which brings the best equipment operation and maintenance convenience.

Claims (2)

It is equipped with two random noise generating circuits of the laser tapping prevention device, which is generated by mixing unspecified noise and radiating it on the surface of the window to make it impossible to decipher, delay or disturb the laser tapping attack. A line monitoring circuit is installed between the main body of the laser eavesdropping device and the vibrator that emits noise to detect the disconnection or short circuit of the line and sends the abnormal signal to the remote site through the transmission circuit to increase the efficiency of equipment maintenance. Eavesdropping device

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