Dynamic authentication protocol for personal communication system (PCS)

The security problem in personal communication systems is a crucial technique for the development of PCS. This paper proposes a dynamic secure protocol suitable for PCS, which is based on the public-key and secret-key hybrid algorithm timestamp and a small storage variable which embodies the dynamic character. The protocol overcomes the threatening problem of clone attack that cannot be resisted in Brown (1995), and remedies for the existing pity in Yu and Harn (1995) and Liu Jianwei and Wang Yumin (1998) in which the maximum times of calling have been limited. In addition, the implementation of the protocol becomes more convenient. The paper analyses the characteristics of this protocol and discusses that the protocol can effectively resist the relay-type clone attack which many secure schemes cannot conquer. Finally, we conclude that the protocol has very good security.