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Recently, Mun et al. analyzed Wu et al.'s authentication scheme and proposeda enhanced anonymous authentication scheme for roaming service in globalmobility networks. However, through careful analysis, we find that Mun et al.'sscheme is vulnerable to impersonation attacks, off-line password guessingattacks and insider attacks, and cannot provide user friendliness, user'sanonymity, proper mutual authentication and local verification. To remedy theseweaknesses, in this paper we propose a novel anonymous authentication schemefor roaming service in global mobility networks. Security and performanceanalyses show the proposed scheme is more suitable for the low-power andresource-limited mobile devices, and is secure against various attacks and hasmany excellent features.

A secure and effective anonymous authentication scheme for roaming service in global mobility networks