Abstract
The shortcomings to 3G Authentication and Key Agreement(AKA) protocol were described through analyzing its procedure and security.An improved scheme of 3G authentication and key agreement protocol was proposed,which achieve authentication of Mobile Equipment(ME) to Visitor Location Register(VLR) and secure transfer of message between VLR to Home Location Register(HLR).The session key established by the protocol was fair for both side of communication without the third party involved.Finally,the formal analysis results of the improved scheme showed its good practicability.
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