Device for protecting cell phone from unsanctioned pickup of information

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

 

The invention relates to techniques for combating commercial and industrial espionage.

A device for removal of a work cell phone in a particular zone, for example the examination hall, store important data, etc. based on a noise generator that is configured on the working frequency band corresponding to the transmission of information between the base station of mobile communication and cellular phone (WO 98/18232 A1, N 04 To 3/00, 30.04.1998).

A disadvantage of the known device is defined by a narrow region of practical use, because in this case are blocked not only send, but also receive information from the cellular telephone. This constant work jammers predetermines increased energy consumption.

The closest to the invention is a device to protect the cell phone against unauthorized removal of information, containing the auxiliary antenna, the radiation detector and the controlled noise generator, a starting circuit which is connected with the output of the detector of radio emission (EN 2183914 C1, H 04 M 1/68, 20.06.2002).

However, the known device is also characterized by limited functionality, because only prevents eavesdropping of confidential negotiations in the room when the attacker is located there cell phone is in the mode the radio is using their cell phone, but does not protect against unauthorized reading of information stored directly in the cell phone. In addition, the attacker can be smoothly and precisely with the help of global positioning systems, determined the location of the cell phone.

Note that currently, cellular telephones to communicate with the computer are widely used in various wireless radio interfaces, such as BLUETOOTH, WiFi, ZeegBee, etc. that create the preconditions for unauthorized removal of information from a cell phone and remote control them. In particular, the interface allows the attacker to use the appropriate equipment to read sensitive data from your phone, notebook, confidential records, and so on) and using global positioning systems to determine the location of the subscriber. Recently, many countries have proliferated phone virus, Cabir and program Trojan Skulls, which can damage the memory and destroy information hundredth phone with any radiointerface channel.

Object of the invention is to enhance the functionality of the protective device by providing protection cell phone from unauthorized eavesdropping on the air interface, and suppressed the I attempts to determine the location of the cell phone. The technical result is to increase the effectiveness of the protection.

The problem is solved in that in the device to protect the cell phone against unauthorized removal of information, containing the auxiliary antenna, the radiation detector and the controlled noise generator, a starting circuit which is connected with the output of the detector of the radiation, put the antenna switch and feature an additional antenna jammer, auxiliary transmitting antenna is made and the detector radiation from the fixing of the beginning of the radiation of the radio interface of the cellular phone when communication with the external device, determine the presence and frequency channel unauthorized communication with a cellular phone interface and configure the corresponding frequency of the controlled oscillator interference, when the antenna switch is turned on with switch auxiliary antenna from the entrance of the radiation detector to the output of the controlled oscillator interference to prevent unauthorized transmission of data over the radio interface, the output of the radiation detector is connected to control inputs of the antenna switch and the controlled noise generator and the noise generator mode is set to constant jamming of radio si is the global positioning excluding the possibility of determining the coordinates of a cell phone.

The task is also promoted by the private significant features of the invention.

In the starting circuit of the controlled noise generator included electronic switch power supply, switch on and turning off the signals of the radiation detector, respectively in the presence and absence of unauthorized communication with a cellular telephone interface.

All of its child nodes are placed in the immediate vicinity of the cell phone, for example in the wall of the pouch for cell phone.

The drawing shows a functional diagram of the proposed device to protect cell phone from unauthorized eavesdropping.

Marked: protected cellular phone 1, the auxiliary antenna 2, the antenna switch 3 controlled noise generator 4, a detector 5, the radiation source 6 power switch 7 and a generator 8 of interference, equipped with individual antenna 9. The trigger circuit is controlled noise generator 4 is connected with the output of the detector 5 of the radio emission. The auxiliary antenna 2 is transmitting. The detector 5 of the radio emission is made with the possibility of fixing the beginning of the radiation of the radio interface of the cellular phone 1 when communication with the external device definition wide-angle is the availability and frequency channel unauthorized connection to the cellular phone 1 through the radio interface and configure the corresponding frequency of the controlled oscillator 4 interference. The antenna switch 3 is enabled with the ability to switch the auxiliary antenna 2 from the entrance of the detector 5 of the radio emission to the output of the controlled oscillator 4 interference to prevent unauthorized transmission of data over the radio interface. The output of the detector 5 of the radio emission is connected with control inputs of the antenna switch 3 and the controlled noise generator 4. For additional generator 8 noise mode is set to constant jamming of radio global positioning systems, excluding the possibility of determining the coordinates of the cellular phone 1.

In the starting circuit of the controlled noise generator 4 includes the electronic switch 7 source 6 power switches and turning off the signals of the detector 5 of the radio emission, respectively in the presence and absence of unauthorized communication with a cellular phone 1 through the radio interface.

All the constituent nodes of the device are located in the immediate vicinity of the cellular phone 1, for example in the wall of the pouch for cell phone 1.

Protection against cell phone 1 from unauthorized eavesdropping on the air interface and the location (coordinates) of the cellular phone 1 is performed as follows.

In the initial state, the antenna switch 3 connects the auxiliary antenna 2 to the detector 5 radioplus the deposits. In the case of attempts to establish a connection with the attacker, the cellular phone 1 through the air detector 5 of the radiation determines the fact of unauthorized communication and a frequency channel, which is communication. (Frequency channel is determined using the detector 5 radio system bandpass filters). After that, the detector 5 includes radio controlled oscillator 4 interference by connecting it to the power source 6 through the electronic switch 7. Simultaneously, the detector 5 of the radio emission (signal activated bandpass filter) sets the corresponding frequency of the controlled noise generator 4 through the antenna switch 3 switches auxiliary antenna 2 to the output of the controlled oscillator 4 interference. Noise radiated into the air, prevent the transmission of data over the radio interface.

To prevent coordinates cell phone (subscriber) 1 using global positioning systems additional generator 8 noise constantly radiates through individual antenna 9 interference at the corresponding frequency, thereby blocking cellular phone 1 receiver system of coordinates.

Thus, the proposed device provides effective protection for cell phone 1 from unauthorized eavesdropping on happy is ointerface with reliable suppression of attempts to determine the location of the cell phone.

1. Device for protecting cell phone from unauthorized removal of information, containing the auxiliary antenna, the radiation detector and the controlled noise generator, a starting circuit which is connected with the output of the detector of radiation, characterized in that it introduced the antenna switch and feature an additional antenna jammer, auxiliary transmitting antenna is made and the detector radiation from the fixing of the beginning of the radiation of the radio interface of the cellular phone when communication with the external device, determine the presence and frequency channel unauthorized communication with a cellular phone interface and configure the corresponding frequency of the controlled oscillator interference, when the antenna switch is enabled with the ability to switch auxiliary antenna from the entrance of the radiation detector to the output of the controlled oscillator interference to prevent unauthorized transmission of data over the radio interface, the output of the radiation detector is connected to control inputs of the antenna switch and the controlled noise generator and the noise generator mode is set to constant jamming of radio global positioning systems, precluding the possibility of defining CSR is dinat cell phone.

2. Device for protection of a cell phone according to claim 1, characterized in that the starting circuit of the controlled noise generator included electronic switch power supply, switch on and turning off the signals of the radiation detector, respectively in the presence and absence of unauthorized communication with a cellular telephone interface.

3. Device for protection of a cell phone according to claim 1 or 2, characterized in that all of its child nodes are placed in the immediate vicinity of the cell phone, for example in the wall of the pouch for cell phone.



 

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