Abstract
Two-factor authentication scheme for roaming service in global mobility network enables the mobile user in possession of a password and a smart card to achieve mutual authentication and session key establishment with the foreign agent. In this paper, we first identify six properties of this type of schemes: (1) Anonymity and untraceability; (2) Robustness; (3) Authentication; (4) Session key security and fairness; (5) User friendliness; and (6) Efficiency, then propose a new scheme which satisfies all these requirements. Our result is validated applying the formal verification tool ProVerif based on applied pi calculus.
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