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Mobile IPv6 will be an integral part of the next generation Internet protocol. The importance of mobility in the Internet gets keeping on increasing. Current specification of Mobile IPv6 does not provide proper support for reliability in the mobile network and there are other problems associated with it. In this paper, the authors propose "Virtual Private Network (VPN) based Home Agent Reliability Protocol (VHAHA)" as a complete system architecture and extension to Mobile IPv6 that supports reliability and offers solutions to the security problems that are found in Mobile IP registration part. The key features of this protocol over other protocols are: Better survivability, transparent failure detection and recovery, reduced complexity of the system and workload, secure data transfer and improved overall performance.
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