Abstract
The user anonymity mechanism provided in GSM and UMTS network is analyzed, and a new approach to solve the anonymity of mobile subscriber is proposed in this paper. Using the ciphering algorithm with a dynamic key and a static key, the method allows mobile subscribers to connect network with user anonymity, and it can be seamlessly integrated with the existing authentication algorithms. The analyses reveal that the proposed scheme can provide the integrity protection of messages, prevent the replay attacks, and be implemented easily.
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