Proxy Mobile IPv6 provides a means of network-based mobility management for mobile nodes without involving the mobile nodes themselves in the mobility signaling.To make Proxy Mobile IPv6 protocol feasible in mobile Internet

a new defined authentication protocol should be accompanied.To the best of our knowledge

no studies have been conducted in the area of Proxy Mobile IPv6 authentication protocol.This paper proposes an authentication protocol in Proxy Mobile IPv6.In addition to providing access authentication

the proposed authentication protocol prevents threats such as replay attack and key exposure.Also

we develop analytic models for the authentication latency and cost analysis.Then

the impacts of mobility and traffic parameters on the authentication cost and latency are analyzed

respectively.The results reveal that the proposed authentication protocol for Proxy Mobile IPv6 is secure and effective.