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Key acquisition method, equipment and system

An acquisition method and technology of equipment, applied in the field of mobile communication, can solve the problems of maintaining key freshness, adverse system security, etc., and achieve the effects of maintaining continuity, improving security, and maintaining freshness

Active Publication Date: 2010-07-07
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] During the implementation of the present invention, the inventors found that there are at least the following problems in the prior art: when performing the above-mentioned network movement, the key of the network after the movement is deduced by the UE / MME according to the key of the network before the movement, To keep the freshness of the key after the network move, it is not conducive to ensuring the security of the system after the network move occurs

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  • Key acquisition method, equipment and system
  • Key acquisition method, equipment and system
  • Key acquisition method, equipment and system

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0024] It can be seen from the foregoing description that in the prior art, when the user terminal moves over the network, the MME generally can only obtain the key before the network move, so as to deduce the key after the network move. The parameters of the key derivation when the network moves are not exactly the same as those when there is no network movement, and the continuity of the key period is not considered, which is not conducive to ensuring the security...

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Abstract

The invention discloses a key acquisition method, equipment and a system. The method includes that: in the moving process of the user terminal from a first network to a second network, a mobility management entity converts the first network encryption key cycle to the second network key cycle; wherein, the first network key cycle is the key cycle which is used by the user terminal in the first network, the second network key cycle is the key cycle which is used by the user terminal in the second network. The mobility management entity sends the second network key cycle to the user terminal sothat the user terminal can deduct the second network key according to the second network key cycle. By using the proposal which is provided by the embodiment of the invention, the key cycle of original network can be considered when the user terminal is moved in network, and the continuity of the key cycle in the network moving is ensured, the safety of system is increased.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a key acquisition method, device and system. Background technique [0002] With the continuous development of communication technology, UE (User Equipment, user terminal) may access the operator's core network through any of the following access methods, such as GERAN (Global System for Mobile communications / Enhanced Data rates for GSM Evolution Radio AccessNetwork, Global System for Mobile Communications / Enhanced Data Rate Global System for Mobile Communications Radio Access Network), UTRAN (Universal Mobile Telecommunication System Terrestrial RadioAccess Network, Universal Mobile Communications System Terrestrial Radio Access Network) and E-UTRAN (evolvedUTRAN, Evolved UTRAN) and so on. [0003] At the same time, users may also move back and forth between multiple access networks. For a dual-mode terminal, it may be registered in UTRAN / GERAN and E-UTRAN at the sam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W8/02H04W12/04H04W36/14H04W12/041
Inventor 庄小君陈璟
Owner HUAWEI TECH CO LTD