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Protection method and system for preventing fraudulent use of mobile terminal

A mobile terminal, anti-theft technology, applied in prepaid phone systems, user identity/authority verification, security devices, etc., can solve the problem of unable to prevent illegal copying or number change of the IMEI number of mobile phones, and achieve the effect of preventing number change

Active Publication Date: 2008-07-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 to be used), and the mobile phone IMEI number cannot be illegally copied or changed (the IMEI number is illegally copied or changed). Copying or changing the number is one of the important reasons for "parallel import" mobile phones)

Method used

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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

Examples

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Embodiment Construction

[0048] The present invention first relates to a method for protecting a mobile terminal from theft against theft. Specifically, an authentication serial number is pre-stored in the mobile terminal; a network-side device verifies the legality of the authentication serial number of the mobile terminal. The mobile terminal is listed as an illegal user. The authentication serial number pre-stored in the mobile terminal is the international mobile station identification number IMEI number; it can also be a 128-bit information digest generated after encrypting the IMEI number. The encryption method is to use an encryption algorithm (which can be MD5 ) to encrypt the IMEI number to obtain the above 128-bit information digest.

[0049] 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 digest) is stored in the O...

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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 an anti-theft technology for mobile terminals, 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 features of the products themselves make 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 it is still showing a growing trend. The ubiquity of mobile phones and the easy-to-carry form factor of the mobile phone itself have also created problems, such as being easily lost or stolen. Such problems cause direct economic losses to users, such as stealing calls; criminals can also take advantage of 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 ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04Q7/32H04L9/32H04M1/675H04W12/02H04W12/06
Inventor 卢红旗
Owner HUAWEI TECH CO LTD
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