A New Amended Authentication Protocol in 3G-WLAN Interworking

Heterogeneous Wireless Network convergence has attracted the attention of researchers. Authentication and key agreement becomes more and more important in this research field. EAP-AKA (Extensible Authentication Protocol Authentication and Key Agreement) is the authentication and key agreement protocol of 3G-WLAN interworking. In this paper, it introduces the procedure of EAP-AKA protocol and analyses the vulnerability and possible attack to this protocol. For the purpose of solving the vulnerability and possible attack to this protocol, an amended scheme based on public key is presented and the analysis of this scheme through strand space model and authentication test has been made. Finally, a comparison of the amended scheme and existent amendment indicated that the amended scheme based on public key is efficient and secure.