Protection method and system for preventing fraudulent use of mobile terminal

A mobile terminal and anti-theft technology, which is applied in prepaid phone systems, user identity/authority verification, security devices, etc., can solve the problem of not being able to prevent illegal copying or changing of mobile phone IMEI numbers, and achieve the effect of preventing number changing

Active Publication Date: 2007-02-14
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0007] In the above-mentioned prior art, after the mobile phone is lost, the illegal user cannot be prevented from continuing to use the mobile phone (even if the SIM card is replaced, the mobile phone cannot be allowed to continue t

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  • Protection method and system for preventing fraudulent use of mobile terminal
  • Protection method and system for preventing fraudulent use of mobile terminal
  • Protection method and system for preventing fraudulent use of mobile terminal

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Embodiment Construction

[0054] The present invention firstly relates to a method for protecting a mobile terminal against theft. Specifically, the authentication serial number is pre-stored in the mobile terminal; The above mobile terminal is listed as an illegal user. The authentication serial number pre-stored in the mobile terminal is the International Mobile Station Identity Number IMEI number; it can also be a 128-bit information summary generated after encrypting the IMEI number. The encryption method is to use an encryption algorithm (which can be MD5) based on the hardware serial number ID number ) to encrypt the IMEI number to obtain the above 128bit information summary.

[0055] The above-mentioned authentication serial number is stored in the Flash memory; it can also be stored in the Flash memory with one-time programming OTP function, and the authentication serial number (such as 128bit information summary) is stored in the OTP area of ​​the Flash memory with OTP function .

[0056]The...

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Abstract

The security protection method and system described in this invention pre-save a serial number of identification in the mobile terminals. The network equipment checks the serial number of identification. If the identification is not passed, the mobile terminals are defined as illegal users, to prohibit the use of network through the mobile phones or lock them by the service provider's network when they are lost of stolen. The serial number of identification (such as 128bit summary information) is stored in the flash memory with a OTP function of one-time programming through the MD5 encryption on IMEI, which can only be written one time and has finished when the mobile phone leaves the factory. The content read out from the second time of writing is not the same one of the writing.

Description

technical field [0001] The invention relates to the anti-theft technology of a mobile terminal, in particular to a protection method and system for preventing a mobile terminal from being stolen after being stolen. Background technique [0002] The decline in the price of mobile phone products and the convenience of the product itself have made mobile phones an increasingly popular electronic product. It is understood that the total number of mobile phone users in the world has exceeded 1 billion, and is still showing a growing trend. The popularization of mobile phones and the easy-to-carry appearance of mobile phones also bring some problems, such as being easily lost or stolen. While causing direct economic losses to users, this type of problem, such as stealing a phone call; criminals can also use the loopholes in the original mobile phone software and hardware to change the "identity" identification number of the mobile phone, such as the IMEI number, so that criminals...

Claims

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Application Information

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IPC IPC(8): H04Q7/32H04L9/32H04M1/675H04W12/02H04W12/06
Inventor 卢红旗
Owner HUAWEI TECH CO LTD
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