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An Enhanced Anonymous Password-based Authenticated Key Agreement Scheme with Formal Proof

With the development of technology, the security of password-based authentication is becoming more and more significant. Recently, Lee et al. proposed an anonymous password-based authenticated key agreement scheme with non-temper resistant smart card to reduce the computation cost of Wang et al.’s scheme. However, based on analysis, it shows that the scheme can’t withstand smart card stolen or lost attack, user impersonation attack and server impersonation attack. Therefore, an enhanced scheme which can resist the attacks mentioned above is presented. By comparing the performance and security with other related schemes, our proposed scheme is more suitable for practical applications.