WO2004059954A1

WO2004059954A1 - Method and means for preventing the mobile communicate device from interceptor by remote control

Info

Publication number: WO2004059954A1
Application number: PCT/CN2003/001140
Authority: WO
Inventors: Minhai Liang; Zhen Chen
Original assignee: Minhai Liang; Zhen Chen
Priority date: 2002-12-31
Filing date: 2003-12-30
Publication date: 2004-07-15
Also published as: AU2003292874A1

Abstract

The invention relates to a method and a means for preventing the mobile communicate device from interceptor, such as the mobile telephone machine, the notebook computer, the PDA, and so on. In the mobile communicate device's circuit, there has a control assembly on the channel which is about the audio frequency signal's production and transmission. The channel can work at one of two states under the assembly's control. And one state is normal, the sound around the mobile communicate device can be transmitted out from the mobile communicate device; the other state is close, the control assembly can close the channel, the channel's inhere function can not work normally. By this, the sound around the mobile communicate device can not be transmitted out from the mobile communicate device. If want to switch the channel from close to normal, it must be touch off by the mechanism action, and it will not be touch off only by the electron manner. In this way, when the mobile communicate device is not talk and the channel is closed, other people can not make the channel normal by the electron remote control manner and can not use the mobile communicate device as a interceptor.

Description

Method and device for preventing mobile communication equipment from being remotely controlled as an eavesdropper

Technical field

The present invention relates to a mobile communication device, and more particularly to a method and device capable of preventing a mobile phone or a mobile computer from being remotely controlled to become a wiretapping device. Background technique

Although most of the various types of mobile phones sold in the Chinese market are currently assembled and produced in China, the main chips are imported from abroad. Even the manufacturers that assemble and produce mobile phones cannot know the source code of the main control chip. It is difficult to guarantee that many imported chips do not contain eavesdropping programming. When the mobile phone is in the standby or shutdown state, others can use the relevant chip in the mobile phone to remotely start the mobile phone into a call state through a certain device, and transmit the sound around the mobile phone to make the mobile phone Machine becomes an eavesdropper (Many experts have disclosed this information in the media. Mr. Li Daguang, Department of Science and Technology, National University of Defense Technology, published an article on "Beware of the Eavesdropper on Your Phone" published by China National Defense News on May 14, 2002. Is a representative article of such reports). Therefore, the "Confidentiality Code" of the military and many state agencies stipulate that, in the case of confidentiality, the mobile phone carrier should remove the battery of the mobile phone or prohibit carrying the mobile phone, which brings great inconvenience to the relevant users.

With the development of computer wireless broadband technology, mobile computers also have the function of wireless calls, and it is also necessary to prevent remote control from becoming a wiretapping device. Summary of the Invention

In order to overcome the shortcomings that existing wireless mobile communication devices such as mobile phones can be remotely used as eavesdroppers when they are not in a call state such as standby and shutdown, the present invention provides a method for preventing wireless mobile communication devices from being remotely turned into eavesdroppers And device, so that the wireless mobile communication device can be prevented from being remotely used as an eavesdropper when not in a call state.

The technical solution adopted by the present invention to solve its technical problems is: placing a control component on a channel of a wireless mobile communication device circuit associated with audio signal generation and transmission (for example, adding a switch to the channel to cut off the channel,

1 Confirm this Short circuit or bypass, connecting an interference circuit to the channel, etc.), so that the channel can be selected to be controlled into one of the following two states, one state is normal, and the sound around the mobile communication device can be normally directed by the mobile communication device External transmission; Another state is a blocking state, and the foregoing control component hinders the normal functioning of the original function of the channel in which it is located. At this time, the sound around the mobile communication device cannot normally be transmitted outward through the mobile communication device, and the channel is blocked from the above. Switching from the off state to the normal state can only be triggered by mechanical actions (such as opening the flip of the foldable phone, clicking, touching the touch screen of the mobile phone or handheld computer, pressing the mobile phone keys, etc.), and it is impossible to trigger only by electronic means. In this way, when the wireless mobile communication device does not talk, and the above-mentioned channel is in a blocked state, others cannot use electronic remote control to change this channel to the normal state, and it is impossible to use the wireless mobile communication device as an eavesdropper. When the wireless mobile communication device needs to talk, the user triggers the channel to switch from the blocked state to the normal state through a habitual mechanical action (such as opening the flip of the mobile phone), and the wireless mobile communication device can talk normally. When not in a call, the channel can be switched to the blocking state by the user's reset action on the displaceable part of the wireless mobile communication device (such as closing the flip of the mobile phone) or the logical determination module of the wireless mobile communication device. The wireless mobile communication device is placed in a state of being prevented from being remotely controlled as an eavesdropper.

The beneficial effect of the present invention is that when the wireless mobile communication device is in a non-talking state, it can be prevented from being remotely controlled to become an eavesdropper. Overview of the drawings

The invention is further described below with reference to the drawings and embodiments.

Fig. 1 is a longitudinal sectional structural view of a first embodiment of the present invention.

Fig. 2 is a circuit block diagram of the first embodiment of the present invention.

Fig. 3 is a schematic diagram of the outline structure of Embodiment 2 of the present invention.

Fig. 4 is a circuit block diagram of a second embodiment of the present invention.

FIG. 5 is a schematic diagram of the external structure of Embodiment 3 of the present invention.

Fig. 6 is a circuit block diagram of a third embodiment of the present invention.

FIG. 7 is a schematic structural diagram of an embodiment 4 of the present invention. FIG. 8 is a schematic circuit block diagram of Embodiment 4 of the present invention.

FIG. 9 is a circuit block diagram of the fifth and eighth embodiments of the present invention.

FIG. 10 is a program flowchart of a logic judgment module in Embodiment 5 of the present invention.

FIG. 11 is a schematic diagram of the external configuration of Embodiment 6 of the present invention.

FIG. 12 is a block diagram of a logic judgment module according to the sixth embodiment of the present invention.

Fig. 13 is a circuit block diagram of the sixth embodiment of the present invention.

FIG. 14 is a schematic diagram of the outline structure of Embodiment 7 of the present invention.

Fig. 15 is a circuit block diagram of a seventh embodiment of the present invention.

In the picture: 1. Bottom of mobile phone, 2. Mobile phone displacement section, 3. Control component, 4 .. On-hook switch, 5. Hands-free function key, 6. Logic judgment module, 7. Laptop displacement section, 8 . Microphone, 9. bottom of laptop. Best Mode of the Invention

Embodiment 1 is designed for an up-and-down folding mobile phone handset. FIG. 1 is a longitudinal sectional structural view of a mobile phone. When the bottom of the mobile phone (1) and the mobile phone displacement unit (2) are closed, the control assembly (3) is in an open state; when the user moves the mobile phone mobile unit (2) from the bottom of the mobile phone (1) When open, the control assembly (3) is in the path state. The control component (3) can have multiple options, such as: mechanical displacement switch, magnetic control switch, light control switch, resistance and capacitance switch. A magnetic switch is used as an example to illustrate the principle: a small magnet is installed on the displacement part (2) of the mobile phone, and this small magnet is part of the control assembly (3); a constant magnet is installed on the bottom (1) of the mobile phone The closed reed switch is another part of the control assembly (3). The installation parts of the two parts are close to each other when the mobile phone is closed. When the mobile phone displacement part (2) is in a reset state, that is, when the mobile phone displacement part (2) and the bottom of the mobile phone (1) are closed, the magnet approaches the reed switch, and the control assembly (3) is open at this time. State; when the mobile phone's displacement part (2) is opened from the bottom (1) of the mobile phone, the magnet leaves the reed switch, and the control unit (3) is in a channel state at this time. Fig. 2 further explains this embodiment in the form of a circuit block diagram. In Fig. 2, the control component (3) may be optionally arranged on the connection line of the microphone (8), and when the mobile phone displacement section (2) is toward the bottom of the mobile phone ( 1) close The channel was cut off when it was up, to prevent the mobile phone from being tapped remotely by others. In implementation, if it is necessary to prevent other sound-electric conversion devices (such as horns, buzzers, and ringers) from being remotely controlled into pickups, you can add unidirectional line processing to the front end, such as adding an operational amplifier and power to the front end. Amplifier, triode, etc.

The second embodiment is designed for the structure of a rotary folding mobile phone handset. FIG. 3 is a structural diagram, and FIG. 4 is a schematic block diagram of an electric circuit. Among them, a magnetic induction sensor is used in the control component (3), and a normally open reed switch is used as an example. The reed switch is installed in the bottom of the mobile phone (1), and the permanent magnet is installed on the displacement part (2) of the mobile phone. When the displacement part (2) of the mobile phone is in a reset state, that is, when the displacement part (2) of the mobile phone and the bottom (1) of the mobile phone are in an overlapped state, the magnet in the control component (3) is close to the reed switch. When the contacts of the reed tube are attracted to the path state, the microphone (8) of the mobile phone is in an audio short circuit state and cannot work, so as to prevent the transmission of audio signals. When the displacement part (2) of the mobile phone and the bottom of the mobile phone ( 1) When in the separated state, the control component (3) is in an open circuit state, the microphone (8) circuit is restored to the normal state, and the mobile phone can work normally.

The third embodiment is designed for the structure of a push-pull mobile phone. FIG. 5 is a structural diagram, and FIG. 6 is a circuit block diagram. The control component (3) uses a light-sensing sensor, and uses a pair of far-infrared transmitting and receiving tubes. The control component (3) is installed in the bottom (1) of the mobile phone, and the corresponding displacement part (2) of the mobile phone is corresponding. Attach a reflective film (such as tin foil, white paper, etc.). When the displacement part (2) of the mobile phone is in a reset state, that is, when the displacement part (2) of the mobile phone and the bottom (1) of the mobile phone are in a superposed state, the light emitted from the emission tube of the control component (3) is refracted by the reflective film to The receiving tube, after the output signal of the receiving tube is shaped by the Schmitt circuit, the control component (3) outputs a low-level state, which causes the microphone (8) to lose the normal bias voltage and cannot work normally, preventing audio signal transmission; When the mobile phone displacement section (2) and the bottom of the mobile phone (1) are in a separated state, because the reflective film is removed, the state of the control component (3) is reversed, the output is 髙 level, and the microphone (8) is normally biased Voltage to restore the mobile phone to its normal working state.

Embodiment 4 is to add a mechanical displacement switch directly controlled by the operator to the mobile phone. FIG. 7 is a schematic diagram of the appearance and structure of this embodiment, and the control component (3) is the switch. FIG. 8 is a schematic block diagram of a circuit. The control component (3) in the figure may be provided in an audio processing module and a power supply, an audio processing module and a central processing unit, and an audio processing module. On the channel between it and the microphone (8), cutting off any of the channels can achieve the purpose of preventing eavesdropping when not talking.

The fifth embodiment is an intelligent logic control anti-eavesdropping mode. Fig. 9 is a circuit block diagram, and Fig. 10 is a program flowchart of a programmable logic judgment module (6). This embodiment uses the habit of the mobile phone user to operate the corresponding button or switch when receiving a call, hanging up, or shutting down. The added logic judgment module (6) detects whether the mobile phone is in a call state and controls the control component. (3), the control component (3) can use electronic gate (such as 74HC4066 integrated block). The mode is determined by the position of the channel where the control component (3) is located, which can be a direct on-off mode, a short-circuit open-circuit mode, or a low-pass bypass mode. As for the control component (3), one or several of them can be selected according to the specific situation, which can achieve the effect of preventing eavesdropping. Since the above channel is switched from the blocked state to the normal state, it must be performed by applying a mechanical action to the mobile phone (such as pressing a key button, touching, or clicking on the induction screen of the mobile phone). It cannot be exploited by a remote control as an eavesdropper. This embodiment can also be applied to a wireless mobile communication device such as an electronic pen touch mobile phone or a PDA, palmtop computer, or tablet PC with both functions of a mobile phone.

The sixth embodiment is designed for the structure of a seat-type mobile phone. Fig. 11 is a schematic diagram of the outline structure, Fig. 12 is a block diagram of a logic judgment module, and Fig. 13 is a circuit block diagram. In FIG. 11, the on-hook switch (4) and the hands-free function key (5) at the bottom (1) of the mobile phone are connected to a and b of the logic judgment module (6) in FIG. 12, respectively. (2) When the speakerphone is put back and the hands-free function is not used, the output c of the logic judgment module (6) will put the control module (3) into the blocking state; When the hands-free function key (5) is used, the output c of the logic judgment module (6) will restore the control module (3) to its normal state. Control components · (3) Electronic switches (such as 74HC4066 manifold) can be selected. As shown in FIG. 13, there are multiple locations where settings can be selected. Selecting any one of the settings can achieve the purpose of preventing eavesdropping when not in a call.

Embodiment 7 is designed for a foldable notebook computer. In FIG. 13, when the bottom portion (9) of the notebook computer and the notebook displacement portion (7) are closed, the control component (3) is in an open state; when the user places the notebook computer When the displacement part (7) is opened from the bottom (9) of the notebook computer, the control unit (3) is in a channel state. There are many options for the control component (3), and the principle is explained by taking a magnetic switch as an example: Install a piece on the displacement part (7) of the laptop A small magnet, which is part of the control assembly (3); a normally closed reed switch is installed at the bottom (9) of the notebook computer, which is the other part of the control assembly (3). The two parts are mounted on the mobile phone. The machines approach each other when they are closed. The displacement portion (7) of the notebook computer is in a reset state, that is, when the displacement portion (7) of the notebook computer and the bottom of the notebook computer

(9) When closed, the magnet is close to the reed switch. At this time, the control unit (3) is in an open state. When the laptop displacement part (7) is opened from the bottom of the laptop (9), the magnet leaves the reed switch. The control unit (3) is in a channel state. FIG. 14 is a schematic block diagram of the circuit of this embodiment. As shown, the control component (3) can be optionally arranged on the connection of the microphone (8). When the notebook displacement unit (7) is closed to the bottom (9) of the notebook This channel is cut off. In this way, when a notebook computer connected to the Internet is in standby, as long as the bottom of the notebook computer (9) and the notebook computer displacement section (7) are closed, it will not be remotely controlled by others to become an eavesdropper.

Embodiment 8 The control component (3) is designed in the form of an interference source. For example, after the A / D coding (analog signal is converted to digital signal) module in Figure 9, a control component (3) with a digital interference source is added. When the logic judges the module

(6) When the mobile phone is detected not to talk, the digital signal generator in the control component (3) is started. Since the interference code sent is not public, the eavesdropping receiving device cannot restore the received signal to the original audio Signal, so as to achieve the purpose of anti-eavesdropping. Similarly, an analog interference source control component (3) can also be added between the microphone (8) and the amplification and filtering module in FIG. 9, and an audio noise generation module can be used. When not talking, the analog type in the control component (3) The noise signal emitted by the interference source will cover the sound signal picked up by the microphone (8) to achieve the purpose of preventing eavesdropping.

Claims

Claim

1. A method for preventing a mobile communication device from being remotely controlled as an eavesdropper, comprising: placing a control component on a channel associated with audio signal generation and transmission in a circuit of the mobile communication device, so that the channel can be selectively controlled to become One of the following two states, one is the normal state, and the sound around the mobile communication device can be transmitted normally through the mobile communication device; the other state is the blocking state, and the aforementioned control component hinders the original function of the channel in which it is located At this time, the sound around the mobile communication device cannot be transmitted normally through the mobile communication device. To switch the channel from the blocked state to the normal state, it must be triggered by mechanical action. .

2. The method for preventing a mobile communication device from being remotely controlled as an eavesdropper according to claim 1, characterized in that: when the displaceable part of the mobile communication device is in a reset state, the channel in claim 1 is in a blocking state, and The channel switching from the blocked state to the normal state can only be triggered by the movement of the movable part of the mobile communication device relative to the other part of the mobile communication device.

3. The method for preventing a mobile communication device from being remotely controlled as an eavesdropper according to claim 1, characterized in that: when the mobile communication device is in a non-talking state, the channel in claim 1 is in a blocking state, and the channel is from Switching from the blocked state to the normal state must be triggered by pressing a key of a mobile communication device, or by touching or clicking on a sensor screen of the mobile communication device.

4. The method for preventing a mobile communication device from being remotely controlled as an eavesdropper according to claim 1, wherein the mobile communication device is a digital mobile phone, or a notebook computer, or a palmtop computer, or a tablet computer, or PDA, or a product with both functions of a digital mobile phone and a handheld computer, or a product with both functions of a mobile phone and a PDA.

5. A device for preventing a mobile communication device from being remotely controlled as an eavesdropper, characterized in that a control component is arranged on a channel associated with audio signal generation and transmission in a circuit of the mobile communication device, so that the channel can be selectively controlled to become One of the following two states, one is the normal state, and the sound around the mobile communication device can be transmitted normally through the mobile communication device; the other state is the blocking state, and the aforementioned control component hinders the original function of the channel in which it is located Normal work At this time, the sound around the mobile communication device cannot be transmitted normally through the mobile communication device. To switch the above channel from the blocked state to the normal state, it must be triggered by mechanical action. .

6. The device for preventing a mobile communication device from being remotely controlled as an eavesdropper according to claim 5, characterized in that: when the displaceable part of the mobile communication device is in a reset state, the channel in claim 1 is in a blocking state, and The channel switching from the blocked state to the normal state can only be triggered by the movement of the movable part of the mobile communication device relative to the other part of the mobile communication device.

7. The device for preventing a mobile communication device from being remotely controlled as an eavesdropper according to claim 5, characterized in that: when the mobile communication device is in a non-talking state, the channel in claim 1 is in a blocking state, and the channel is from Switching from the blocked state to the normal state must be triggered by pressing a key of a mobile communication device, or by touching or clicking on a sensor screen of the mobile communication device.

8. The device for preventing a mobile communication device from being remotely controlled as an eavesdropper according to claim 5, wherein: the mobile communication device is a digital mobile phone, or a notebook computer, or a palmtop computer, or a tablet computer, or PDA, or a product with both functions of a digital mobile phone and a handheld computer, or a product with both functions of a mobile phone and a PDA.