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Advancement in wireless technologies allows mobile devices to access Internet from anywhere at any time. Each network is identified by unique IP address. Mobile IP allows a mobile node to change its network without changing IP address. Internet Engineering Task Force (IETF) has suggested several mobility management protocols such MIPv6, HMIPv6, PMIPv6 etc. for perpetual mobility. MIPv6 is a Host-Based Mobility Management (HBMM) protocol and provides global mobility solution to the mobile node. MIPv6 suffers from basic mobility related problems such as handover latency, packet loss etc. Recently the IETF has suggested Network-Based Mobility Management (NBMM) protocol. The Proxy Mobile IPv6 (PMIPv6) is first NBMM protocol. PMIPv6 significantly decreases the signaling overhead, but still has some issues related to the security, handover latency and packet loss. This paper proposes Secure and an Optimized Authentication Scheme in PMIPv6 (SOAS-PMIPv6) to reduce signaling overhead. The proposed scheme provides higher security than the basic PMIPv6 protocol and moreover reduces the signaling cost with respect to contemporary protocols. This paper performs comprehensive analysis on handover latency, packet delivery cost, packet loss etc. and the performance of protocols is mathematically investigated. Numerical result shows that the proposed scheme has improved performance than the MIPv6 in terms of handover latency and provides optimized security than PMIPv6 based protocols.

Secure and Optimized Authentication Scheme in Proxy Mobile IPv6 (SOAS-PMIPv6) to reduce Handover Latency