Mobility

Delegation-Based in On-Line and Off-Line Authentication Over Wireless Communication

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Executive Summary

Portable communication system provides mobile users with global roaming services. Localized authentication protocol is presented for inter-network roaming across wireless LANS. Private authentication protocol is presented to prevent the home location register. The concept of delegation in wireless communication is used to solve the problems of data security, user privacy and efficiency in PCSs. Authentication protocol contains online and off-line authentication processes. In the on-line authentication process, VLR connects with HLR when MS accesses the network through VLR and demands authentication. HLR also leaves secure authentication tokens with MS and VLR in this process.

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