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The third generation partnership project (3GPP) has addressed the feasibilityof interworking and specified the interworking architecture and securityarchitecture for third generation (3G)-wireless local area network (WLAN), itis developing, system architecture evolution (SAE)/ long term evolution (LTE)architecture, for the next generation mobile communication system. To provide asecure 3G-WLAN interworking in the SAE/LTE architecture, Extensibleauthentication protocol-authentication and key agreement (EAP-AKA) is used.However, EAP-AKA have several vulnerabilities. Therefore, this paper not onlyanalyses the threats and attacks in 3G-WLAN interworking but also proposes anew authentication and key agreement protocol based on EAP-AKA. The proposedprotocol combines elliptic curve Diffie-Hellman (ECDH) with symmetric keycryptosystem to overcome the vulnerabilities. The proposed protocol is used inhybrid coupled 3G-WLAN convergence network to analyse its efficiency in termsof QoS metrics, the results obtained using OPNET 14.5 shows that the proposedprotocol outperforms existing interworking protocols both in security and QoS.

Security Enhancement With Optimal QOS Using EAP-AKA In Hybrid Coupled 3G-WLAN Convergence Network