With the increasing the number of mobile users for the wireless networks that have been deployed, the security featured authentication protocol for accessing the network for the user service has been gaining the importance and playing the contributing role. In this paper, a enhanced authentication protocol with PKI-based-certificate scheme is proposed for the wireless networks such as wireless LAN, wireless MAN and Wibro. With the proposed authentication mechanism, user identity confidentiality would be kept private and also the time for authentication would be reduced to practically usable level in terms of authentication time and power consumption efficiency, effectively in the heterogeneous all IP network.

authentication, PKI, wireless network, wireless security, Wibro.