Device for acoustic protection cell phone standard gsm when an unauthorized activation

 

The invention relates to techniques for combating commercial and industrial espionage. The device includes a housing having a socket to install cell phone. The case contains a radiation detector cell phone and acoustic emitter, mounted with the possibility of the direction of the noise masking loudspeaker to the microphone of the cellular phone. In addition, in the case of additionally placed the processing unit of analysis and control, programmable permanent memory device with a communication Protocol, a keypad, display, interface, position sensor cell phone and the sensor signals of the call. The unit of analysis and management are interrelated with reprogrammable read-only memory. In this device the start of the acoustic emitter is only when ad hoc activating the cell phone with the purpose of eavesdropping. The invention provides increased comfort for users of cellular phones while maintaining the quality of protection against eavesdropping, as well as expanding the functionality of the protective device. 6 C.p. f-crystals, 1 Il.

The invention relates to a technique of counteracting to Olenich in the premises or in vehicles.

The known device to prevent unauthorized listening to the talks in the premises connected to the subscriber line telephones, which are based on the gap and shortages of the line in the quiescent state with the help of switching bodies (DE 1487453 AND 16.01.1969; EP 0365741 A2, 02.05.1990; EN 2145153 C1, 27.01.2000).

The practical use of such devices requires substantial upgrading of existing telephone systems.

Also known device to avoid listening, performing jamming preventing the dial from outside, are connected in parallel, telephone or hinder the perception of it speech signals (FR 2655224 A1, 31.05.1991; EN 92006880 AND 20.01.1995; EN 14794 U1, 27.08.2000; EN 2183914 C1, 20.06.2002).

The closest of these to the invention is a device for acoustic protection cell phone when an unauthorized activation of the patent RU 2183914 C1, comprising a housing having a socket to install cell phone with switching under the action of its gravity switch power source, and accommodated in the housing of the radiation detector cell phone and acoustic emitter, mounted with the possibility Namestovo device associated with the generation of noise when any calls to cell phone, including regulated, which implies a significant inconvenience for users. In addition, the known device is characterized by limited functionality, not allowing, in particular, to monitor the activity of communication through cell phones subscribers and to inform the latter about the events of communication and modes of protection.

The objective of the invention is to increase the comfort for the users of cellular phones while maintaining the quality of protection against eavesdropping, as well as expanding the functionality of the protective device.

The problem is solved in that the device for acoustic protection cell phone when an unauthorized activation, comprising a housing having a slot to insert the cell-phone switching switch power supply, and housed in the housing of the radiation detector cell phone and acoustic emitter, mounted with the possibility of the direction of the noise masking loudspeaker to the microphone in Jack of the cell phone, in case additionally mounted in the CPU unit of analysis and management, reprogrammable Poutchek provisions cell phone and the sensor signals of the call, thus the unit of analysis and management are interrelated with EPROM and inputs connected to the outputs of the position sensor cell phone, the sensor signals of the call, the radiation detector cell phone and keyboard, and output to the trigger input of the acoustic emitter and the inputs of the indicator and interface.

The task promote private significant features of the invention.

In EPROM written communication Protocol in a radio standard GSM.

The unit of analysis and management made with the possibility of device settings and viewing envelope emitted by a cellular phone of a high frequency signal on the display, logging data exchange in EPROM, the analysis of cumulative events, control activity data exchange cell phone subscribers, the highlight of the event is limited and ad hoc calls with reference them by label, time, generating control signals for the acoustic emitter when the identified ad hoc calls, informing subscribers about the events of communication and modes of protection.

Acoustic emitter includes connected in series generator noise control is ispolnen with the possibility of removing stored in the EPROM of the communication Protocol on the external computer type IBM PC and view it using the appropriate programs of the received data in a table with sorting them by time and events, as well as monitoring the response of the devices and subscribers to these events.

The position sensor cell phone made optoelectronic.

The power source includes sequentially connected network adapter and charger, the latter of which is interconnected with the battery.

The drawing shows a structural diagram of the proposed device.

The device contains housed in a common housing of the radiation detector 1 cell phone (with auxiliary antenna), the acoustic emitter 2, the processing unit 3 analysis and management, non-volatile EPROM 4 communication Protocol, block 5 keyboard, built-in indicator (character LCD) 6, a built-in interface 7, the sensor 8 position cell phone and the sensor 9 ringtones. Blocks 1, 2, 8, and 9 form the periphery in the overall structure of the device.

Unit 3 analysis and management are interrelated with EPROM 4 and inputs connected to the outputs of the sensor 8 position cell phone, sensor 9 ringtones, detector 1 radiation cell phone and block 5 of the keyboard and output to the trigger input of the acoustic emitter 2 and the inputs of the indicator 6 and the interface 7.

Acoustic emitter 2 is installed with who is starting the phone.

The power source includes sequentially connected network adapter 10 and the charger 11. The latter is interconnected with the battery 12.

The sensor 8 position cell phone made optoelectronic.

The housing has a slot to insert a cell phone.

In the EPROM 4 written communication Protocol of the GSM standard.

Unit 3 analysis and management made with the possibility of device settings and viewing envelope emitted by a cellular phone of a high frequency signal on the display 6, the logging data exchange in EPROM 4, the analysis of cumulative events, control activity data exchange cell phone subscribers, the highlight of the event is limited and ad hoc calls with reference them by label, time, generating control signals for the acoustic radiator 2 with the identified ad hoc calls, informing subscribers about the events of communication and modes of protection.

The interface 7 is made with the possibility of removing stored in the EPROM of the communication Protocol on the external computer type IBM PC and view it using the appropriate (specialized) program and none of the subscribers to these events.

The proposed protective device is as follows.

In normal mode, the corresponding unused cell phone, the latter is inserted into the socket housing of the protective device. Thus from the power source 10-12 and electronic components of the device supplied voltage. At the same time overlap of the optical channels of the respective photo-coupler sensor 8 position cell phone and the signal indicating the presence of a cell phone in the nest, is supplied to the unit of analysis and management 3.

If any (regulated and unregulated) activating the cell phone, i.e., the introduction of the mode of the radio, antenna cell phone begin to radiate radio waves, which are auxiliary antenna and detected in the detector 1 radiation cell phone. Signal indicating the cell phone call, is sent to the unit 3 analysis and management.

The unit of analysis and management 3 examines high frequency (900-1800 MHz) data exchange cell phone with the base station and the structure of the exchange and whether the signal call, a decision is made about events in the radio link, which are recorded in accordance with pamantasang data exchange cell phone with the base station with the binding of these events by timestamp.

If it is determined that the process is confidential negotiations in the room is ad hoc activation are there cell phone to eavesdrop, the signal from the corresponding output unit 3 analysis and management is the start of the acoustic emitter 2.

Generator noise in the acoustic radiator 2 is synthesized with the ability to generate pink noise in the frequency range 300 Hz - 4.5 kHz. The level of acoustic noise at the microphone of the cell phone, i.e., at the entrance of the vocal tract, set no less than 5 times greater than the level of the speech signal.

These electrical interference are brought to mask the dynamics of the acoustic emitter 2 performing electroacoustic conversion. Generated acoustic noise from the speaker is transmitted to the microphone of the cell phone, which also perceives and speech signals negotiators.

Thus, unauthorized listening negotiations over the cellular phone to be used in the remote access mode, are unsuccessful.

It is important to emphasize that in the proposed device with a regulated calls and regular modes of exchange of telemetry protection. Start acoustic emitter 2 is only for ad-hoc calls. This improves the acoustic comfort of this device in comparison with the known.

Note that, if a regulated call cell phone was a user raised, and then lowered into the socket, short-term operation of the radiation detector 1 does not cause the formation of a masking noise, because the specified mode is standard. Add that to lock record voice information from the cellular telephone provides a continuous network of acoustic noise. Thus there is a decrease in the sensitivity of the circuit network of the phone.

The service includes installation and viewing device settings on the built-in indicator 6, operative informing subscribers about the events of the exchange and acoustic modes of protection.

Built-in interface 7 provides the ability to display stored in the EPROM 4 Protocol on the external computer type IBM PC and view it using the appropriate program received data in a tabular form, to sort them by time and events, as well as to control the reaction device and the protection cell phone when an unauthorized activation, comprising a housing having a socket for mounting a cellular telephone, and also accommodated in the housing of the radiation detector cell phone and acoustic emitter, mounted with the possibility of the direction of the noise masking loudspeaker to the microphone in Jack cell phone, characterized in that the housing is additionally mounted in the CPU unit of analysis and control, programmable permanent memory device with a communication Protocol, a keypad, display, interface, position sensor cell phone and the sensor signals of the call, the unit of analysis and management are interrelated with reprogrammable read-only memory and inputs connected to the outputs of the position sensor cell phone, sensor signals of the call, the radiation detector cell phone and keyboard, and output to the trigger input of the acoustic emitter and the inputs of the indicator and interface.

2. The device under item 1, characterized in that programmable permanent memory the recorded data exchange Protocol in the radio link GSM.

3. The device under item 1, characterized in that the unit of analysis and control with adjustable ustroistvye event data exchange in reprogrammable ROM, analysis of the accumulated events, control activity data exchange cell phone subscribers, the highlight of the event is limited and ad hoc calls with reference them by label, time, generating control signals for the acoustic emitter when the identified ad hoc calls, informing subscribers about the events of communication and modes of protection.

4. The device under item 1, characterized in that the acoustic emitter includes connected in series jammer, the control input of which is a trigger input acoustic emitter, and the masking speaker.

5. The device under item 1, characterized in that the interface has a capability of removing stored in the programmable ROM of the communication Protocol on the external computer type IBM PC and view it using the appropriate programs of the received data in a table with sorting them by time and events, as well as monitoring the response of the devices and subscribers to these events.

6. The device under item 1, characterized in that the position sensor cell phone made optoelectronic.

7. The device under item 1, from the device, the latter of which is interconnected with the battery.

 

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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

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