Abstract
In recent years, many anonymous password-based mobile user authentication techniques have been constructed for roaming service in global mobility networks. However, such type of protocol has not yet been devised in the random oracle model using extended chaotic map. Therefore, in this paper, we put forwarded a new provably secure and privacy-preserving password authentication protocol using extended chaotic maps for roaming service in wireless networks. The proposed protocol is provably secure and protects active and passive attacks under the chaotic maps-based Diffie-Hellman (CDH) assumption in the random oracle model. The proposed protocol is also analyzed and compared with the related protocol. The results proved that it is strong enough to resist different security vulnerabilities and efficient against the existing protocol.