WO2012126196A1

WO2012126196A1 - Apparatus for preventing illegal downloading

Info

Publication number: WO2012126196A1
Application number: PCT/CN2011/074108
Authority: WO
Inventors: 周加品
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-03-18
Filing date: 2011-05-16
Publication date: 2012-09-27
Also published as: CN102149081B; CN102149081A

Abstract

Disclosed in the present invention is an apparatus for preventing illegal downloading. An executing unit (14) is set between a main chip (11) and a download interface (12) of a mobile terminal; a control unit (13) inputs a control signal to the executing unit (14), under the control of the main chip (11) of the mobile terminal, to trigger a disconnection implemented by the executing unit (14) between the main chip (11) and the download interface (12). By adopting the present invention, hackers are prevented from illegally reading and downloading data from a mobile terminal, and the purpose of network-locking is achieved better.

Description

Device for preventing illegal downloading

The present invention relates to security technologies in the field of communications, and more particularly to an apparatus for preventing illegal downloading. Background technique

At present, with the rapid development of mobile terminals such as the mobile phone market, the competition among mobile operators is becoming more and more fierce. In order to attract more users, various mobile operators have taken many subsidies, such as: high-subsidized mobile phones or Internet cards, and even free mobile phones or Internet cards, etc. In this case, the mobile phone is required to have a lock lock card. The function makes the subsidized mobile phone not available on other operators' networks. Here, the lock network function means: The mobile phone can only be used on a specific network of one operator, and cannot be used on the network provided by other operators; The lock card function means: The mobile phone can only use one global subscriber identity module (USIM) , Universal Subscriber Identity Module ) card or a USIM-like card that binds the phone to a specific number.

In order to realize the lock network lock card technology and prevent hackers from cracking the lock lock function of the mobile phone, the current lock network lock card technology is generally implemented by software encryption. However, no matter how powerful the software encryption algorithm is, there will be loopholes, and if there are loopholes, it will be cracked by hackers. Therefore, it is urgent to consider the technical solution to solve the problem from the hardware point of view, so as to better achieve the purpose of the lock network. Summary of the invention

In view of this, the main object of the present invention is to provide a device for preventing illegal downloading, which can effectively prevent a hacker from illegally reading and downloading data to a mobile terminal, and better achieve the purpose of locking the network.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention provides an apparatus for preventing illegal downloading, including: a main chip of a mobile terminal, And the download interface, the device further includes: a control unit, and an execution unit; wherein, the control unit is configured to output a control signal to the execution unit under the control of the main chip; the execution unit is serially connected to the main chip and the download interface of the mobile terminal Between, for disconnecting the connection between the main chip of the mobile terminal and the download interface by using a control signal input from the control unit.

In the above solution, the control unit comprises: a battery, a switch circuit, and a boost circuit; the battery is connected to the switch circuit; the switch circuit is disposed between the battery and the boost circuit, and the control end of the switch circuit and the main chip of the mobile terminal The pins are connected; the boost circuit is connected to the execution unit;

Correspondingly, the execution unit comprises: a fuse blowing circuit, and a fuse;

Both ends of the fuse blowing circuit are connected to the fuse.

In the above solution, the switch circuit further includes a switch;

The switches are: Field Effect Transistors (FETs), or triodes, or analog switches, or relays.

In the above solution, the booster circuit is a DC (Direct Current)-DC converter control circuit.

In the above solution, the fuse blowing circuit comprises: a resistor and a semiconductor device having a current amplifying function;

One end of the resistor is connected to the fuse, and the other end is connected to a current input end of the semiconductor device, and a current amplifying end of the semiconductor device is connected to the fuse.

In the above solution, the semiconductor device having the current amplifying function is a triode or a metal oxide semiconductor field effect transistor.

In the above solution, the control unit is a control signal output pin of the main chip of the mobile terminal; the execution unit is a switch circuit, the switch circuit includes a switch, and the control end of the switch and the control of the main chip of the mobile terminal The signal output pins are connected. In the above solution, the switch is: a FET, or a triode, or an analog switch, or a relay. The device for preventing illegal downloading provides a serial connection execution unit between the main chip of the mobile terminal and the download interface; the control unit inputs a control signal to the execution unit under the control of the main chip of the mobile terminal to trigger the execution unit to be disconnected. The connection between the main chip and the download interface prevents the hacker from illegally reading the mobile terminal and downloading the data, thereby better achieving the purpose of the lock network. DRAWINGS

1 is a schematic structural diagram of an apparatus for preventing illegal downloading according to the present invention;

2 is a schematic structural diagram of an apparatus for preventing illegal downloading according to an embodiment of the present invention;

3 is a schematic diagram of a fuse blowing circuit according to Embodiment 1 of the present invention;

FIG. 4 is a schematic structural diagram of an apparatus for preventing illegal downloading according to Embodiment 2 of the present invention. detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

The device for preventing illegal downloading, as shown in FIG. 1, includes: a main chip 11 of the mobile terminal, a download interface 12, a control unit 13, and an execution unit 14;

The control unit 13 is configured to output a control signal to the execution unit 14 under the control of the main chip 11 of the mobile terminal;

The execution unit 14 is connected in series between the main chip 11 of the mobile terminal and the download interface 12 for disconnecting the connection between the main chip 11 of the mobile terminal and the download interface 12 by using a control signal from the control unit 13.

The present invention will be further described in detail below with reference to the embodiments.

Embodiment 1:

2 is a schematic structural diagram of an apparatus for preventing illegal downloading of a mobile terminal according to Embodiment 1. As shown in FIG. 2, the control unit 13 includes: a battery 131, a switch circuit 132, and a boosting power The battery 131 is connected to the switch circuit 132; the switch circuit 132 is disposed between the battery and the boost circuit, and the control end of the switch circuit 132 is connected to the pin of the main chip 11 of the mobile terminal; the boost circuit 133 is executed The unit 14 is connected; correspondingly, the execution unit 14 includes: a fuse blowing circuit 141, and a fuse 142, and two ends of the fuse blowing circuit 141 are connected to the fuse 142.

The battery 131 is a battery of the mobile terminal itself, and is also used to supply power to the main chip 11 of the mobile terminal, which is generally 3.4 to 4.2 V. The voltage input from the boosting circuit 133 to the fuse blowing circuit 141 is higher than the voltage of the battery 131. The fuse blowing circuit 141 can use the voltage to blow the fuse 142, and the voltage input from the boosting circuit 133 to the fuse blowing circuit 141 cannot affect the performance of the main chip 11 of the mobile terminal, such as: burning the main chip, etc., therefore, The voltage value input by the boosting circuit 133 cannot exceed the voltage value required to burn out the main chip 11 of the mobile terminal.

The switch circuit 132 further includes a switch, which may be: a FET, or a triode, or an analog switch, or a relay, or the like. Taking the switch as an N-channel insulated gate field effect (MOS) tube as an example, the connection relationship between the switch and each component is described in detail. The MOS transistor has three poles, which are source S, drain D, and gate G, respectively. Referring to the S pole, the D pole, and the G pole, respectively, the D pole of the MOS transistor is connected to the positive pole of the battery 131, the S pole is connected to the boost circuit 133, and the G pole is connected to the control interface of the main chip 11 of the mobile terminal. The on/off of the switch circuit 132 is controlled by the level of the control interface output of the main chip 11 of the mobile terminal, thereby controlling whether the voltage of the battery 131 is input to the booster circuit 133. Specifically, when the control interface of the main chip 11 of the mobile terminal outputs a logic high level, that is, when G is extremely high, the MOS transistor is turned on, the switch circuit is closed, and the voltage of the battery 131 is input to the booster circuit 133 when moving. When the control interface of the main chip 11 of the terminal outputs a logic low level, that is, when G is extremely low, the MOS transistor is turned off, and the voltage of the battery 131 cannot be input to the boosting circuit 133. The control interface of the main chip 11 of the mobile terminal may be any one of the control interfaces of the main chip 11 of the mobile terminal.

Here, it should be understood: When the switch is a triode, an analog switch, or a relay, etc., the switch The specific connection to the various components is a common technical means by those skilled in the art.

The boosting circuit 133 may specifically be a DC-DC converter control circuit, such as a commonly used integrated chip MC34063, which can boost the input battery voltage to a high voltage, where the input battery voltage is generally 3.4V-4.2V.

The fuse blowing circuit 141 further includes: a resistor and a semiconductor device having a current amplifying function, one end of the resistor is connected to the fuse 142, and the other end is connected to a current input end of the semiconductor device having a current amplifying function The current amplification end of the semiconductor device is connected to the fuse 142. Here, the semiconductor device having a current amplification function is a triode, or a metal oxide semiconductor field effect transistor (MOSFET, Metal-Oxide-Semiconductor Field- The current input terminal of the semiconductor device having the electrical amplification function refers to a small current terminal, and the current amplification terminal of the semiconductor device refers to the end at which the input small current has been amplified, specifically, For a triode, the current input terminal refers to the base of the triode, the current amplification terminal refers to the collector of the triode, and for the MOSFET, the current input terminal refers to the gate of the MOSFET, and the current amplification terminal refers to the MOSFET. The drain.

The appropriate fuse can be selected according to the fuse current value of the fuse. Generally, the fuse has a fuse current value of 200 mA, and after the fuse 142 is blown, it cannot be used again.

3 is a schematic diagram of a fuse blowing circuit of the first embodiment. As shown in FIG. 3, the fuse blowing circuit is composed of a first resistor 1411, a second resistor 1412, and a transistor 1413; wherein, one end of the first resistor 1411 and the fuse 142 One end is connected, and a connection point of the first resistor 1411 and the fuse 142 is connected to the download interface 12 of the mobile terminal, and the other end of the first resistor 1411 is connected to the base of the transistor 1413, and one end of the second resistor 1412 is The base of the transistor 1413 is connected, the other end of the second resistor 1412 is connected to the emitter of the tertiary tube 1413, and the emitter is grounded, the other end of the fuse 142 is connected to the collector of the transistor 1413, and the fuse 142 The connection point with the collector of the transistor 1413 is connected to the main chip 11 of the mobile terminal. Here, the triode 1413 is selected according to the need, and the triode 1413 can adopt any one of the existing triode types; according to the current value of the base of the selected triode, the resistance value in the appropriate fuse fusing circuit 141 is selected, and the specific resistance The acquisition of the value is a common technical means by those skilled in the art and is not within the scope of protection of the present invention and will not be described in detail herein.

The circuit operation principle of this embodiment will be described in detail below.

The device for preventing illegal downloading provided by the embodiment, before the mobile terminal uses, under the control of the main chip of the mobile terminal, inputs the battery voltage into the input end of the boosting circuit through the state of the switching circuit, and the boosting circuit inputs the input The voltage of the battery is boosted to a high voltage and applied to one end of the fuse. The fuse fuse circuit converts the input high voltage into a large current. After a large current flows through the fuse, the fuse is blown, thereby disconnecting the main terminal of the mobile terminal. The connection between the chip and the download interface, ie: disconnect the download path.

Here, the existing lock network technology is generally performed by means of software encryption. The method of cracking is: reading out the binary file in the memory of the mobile terminal, and modifying the encrypted part of the file before re-burning to the mobile In the terminal. Wherein, obtaining the file in the memory of the mobile terminal and burning the modified file into the mobile terminal again must be implemented by downloading. Therefore, in this embodiment, by adding a fuse and a fuse blowing circuit between the main chip of the mobile terminal and the download interface, before the mobile terminal is sold to the user for use, after the fuse is blown, the memory of the mobile terminal can no longer be used. Read the file and burn the modified file to the mobile terminal again.

When the fuse is not blown, the data is sequentially passed from the external device through the download interface, the fuse reaches the main chip of the mobile terminal, and then transferred to the memory to complete the entire downloading process; correspondingly, the data is transferred from the memory to the main chip of the mobile terminal, and then After the fuse and the download interface reach the external device, the process of reading data from the mobile terminal is completed; the external device may specifically be a personal computer (PC, Personal Computer) or the like.

After the main chip of the mobile terminal receives the fuse blow command, it determines whether the mobile terminal has a lock network. After the identification, the lock network identifier is determined, and a control signal such as a high level is output to the control interface connected to the switch circuit to trigger the switch circuit to turn on the battery and the boost circuit.

After the production test is completed, and after the mobile terminal is powered on, the fuse fuse command is input on the standby interface, and the command is pre-stored in the memory of the mobile terminal, and the production technician can directly obtain the fuse blow command from the memory; The lock operation of the mobile terminal is the final step of the production test process. When the mobile terminal completes the lock operation, the lock network identifier is written into the memory of the mobile terminal, and the main chip of the mobile terminal can directly read the lock from the memory. Web logo. When the mobile terminal completes the network lock operation, the download path is no longer needed. At this time, the production technician can input the fuse blow command on the standby interface to perform the corresponding processing of disconnecting the download path. Here, the lock network identifier is used to indicate that the mobile terminal has been locked, that is, the mobile terminal has the function of locking the network. The main chip of the mobile terminal can output a control signal such as a high level to the control interface connected to the switch circuit according to the lock network identifier, to trigger the switch circuit to turn on the battery and the boost circuit, thereby achieving the purpose of automatically fusing the fuse, and thus, The production technician is required to blow the fuse by hand.

When it is determined that the mobile terminal does not have a lock network identifier, the master chip of the mobile terminal can prompt the production technician to perform a lock network operation. After receiving the prompt, the production technician completes the lock operation and writes the lock network identifier into the memory of the mobile terminal. Then, the fuse blow command can be input on the standby interface to perform the corresponding processing of disconnecting the download path. The specific processing procedure for performing the network locking operation is exactly the same as the existing processing procedure for performing the network locking operation, and details are not described herein again.

Embodiment 2:

4 is a schematic structural diagram of an apparatus for preventing illegal downloading of a mobile terminal according to Embodiment 2. As shown in FIG. 4, the control unit is a control signal output pin of the main chip 11 of the mobile terminal, and the output signal is generated by a main chip of the mobile terminal. 11 Provided, the execution unit is a switch circuit 143. The switch circuit 143 further includes a switch, and the switch may be: FET, or three-pole A control port of the switch, or an analog switch, or the like, is connected to a control signal output pin of the main chip 11 of the mobile terminal.

In the device for preventing illegal downloading provided by the embodiment, after receiving the command to close the download path, the main chip of the mobile terminal determines whether the download path is connected, determines that the download path is connected, and outputs a control signal to the control interface connected to the switch, such as low power. Equivalent, to trigger the connection between the main chip of the mobile terminal and the download interface.

Wherein, during the production test, the status flag of the switch is set in the mobile terminal, after the production test is completed, and after the mobile terminal is powered on, the production technician inputs a command to close the download path on the standby interface, and the main chip of the mobile terminal After receiving the command to close the download path, it is determined whether there is a status flag of the switch connected, and if so, the download path is considered to be connected, and then a control signal is output to the control interface connected to the switch to trigger the switch to disconnect the main terminal of the mobile terminal. The connection between the chip and the download interface, and clear the status flag of the switch connected. If there is no status flag of the connected switch, the download path is considered to be disconnected, indicating that the download path has been disconnected.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

Claim

A device for preventing illegal downloading, comprising: a main chip of a mobile terminal, and a download interface, wherein the device further comprises: a control unit, and an execution unit;

a control unit, configured to output a control signal to the execution unit under the control of the main chip; the execution unit is serially connected between the main chip of the mobile terminal and the download interface, and is configured to disconnect the mobile terminal by using a control signal input from the control unit The connection between the main chip and the download interface.

2. The apparatus according to claim 1, wherein the control unit comprises: a battery, a switching circuit, and a boosting circuit;

The battery is connected to the switch circuit; the switch circuit is disposed between the battery and the boost circuit, and the control end of the switch circuit is connected to the pin of the main chip of the mobile terminal; the boost circuit is connected to the execution unit;

Both ends of the fuse blowing circuit are connected to the fuse.

3. The device according to claim 2, wherein the switch circuit further comprises a switch;

The switch is: a field effect transistor (FET), or a triode, or an analog switch, or a relay.

4. Apparatus according to claim 2 wherein said boost circuit is a direct current (DC) - DC converter control circuit.

5. The device according to claim 2, 3 or 4, wherein the fuse blowing circuit comprises: a resistor and a semiconductor device having a current amplifying function;

The device according to claim 5, wherein said current amplification function The semiconductor device is a triode, or a metal oxide semiconductor field effect transistor.

The device according to claim 1, wherein the control unit is a control signal output pin of a main chip of the mobile terminal;

The execution unit is a switch circuit, and the switch circuit includes a switch, and a control end of the switch is connected to a control signal output pin of a main chip of the mobile terminal.

8. Apparatus according to claim 7 wherein the switch is: a FET, or a triode, or an analog switch, or a relay.