Secure handoff based on dual session keys in mobile IP with AAA

The Mobile IP has evolved from providing mobility support for portable computers to support wireless handheld devices with high mobility patterns. The Mobile IP secures mobility, but does not guarantee security. In this paper, the Mobile IP has been adapted to allow AAA protocol that supports authentication, authorization and accounting for authentication and collection of accounting information of network usage by mobile nodes. For this goal, we propose a new security handoff mechanism to intensify the Mobile IP security and to achieve fast handoff. In the proposed mechanism, we provide enough handoff achievement time to maintain the security of mobile nodes. According to the analysis of modeling result, the proposed mechanism compared the basic Mobile IP along with AAA protocol is up to about 60% better in terms of normalized surcharge for the handoff failure rate that considers handoff time.