A New Mutual-authenticated Scheme for a Smart Card in Wireless Communications

Secure user authentication is an important issue in wireless environments. Various user authentication schemes have been proposed in recent years. In 2012, Mun et al. presented an enhanced secure anonymous authentication scheme for roaming service in global mobility networks. However, Mun et al.’s scheme is not secure. In this paper, we show that Mun et al.’s scheme can not provide the mutual authentication between MU and FA, and it also can not resist the insider attack by HA and MU, and the MU’s forgery attack. We also propose a new mutual-authentication scheme for a smart card in wireless communications in this paper. The proposed scheme not only provides the user anonymity, mutual authentication, but also resists the insider attacks, forgery attacks and replay attacks.