Abstract
Recent years have seen an explosive growth of interest in mobile networks that support the mobility. The mobility of users, the transmission of signals through open air and the requirement of low power consumption by a mobile user bring to a mobile network a large number of new security issues. In this paper, we propose an optimized protocol for mobile network authentication and security. The particular features of the new proposal are: (1) only a public parameter (a large prime p) and the public key of the certification authority (y ca ) is required knowledge for all network participants; (2) only a block cipher is used as both the secret-key encryption algorithm and the underlying cipher of the hash function.
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