Authentication and Key Agreement in a 3G-INTERNET-WiFi Crossplatform Communication System

As a new breed of enterprise services that have spawned from the Internet to also include metropolitan 3G, WiFi, and WiMAX networks today, cross-platform communication system is widely studied and deployed. At the same time, the performance and the security of cross-platform communication system are becoming the focus. In this paper, we present two authentication and key agreement protocols in our 3G-Internet-Wi-Fi cross-platform communication system, one based on pre-set password and one on certificate. They provide a foundation for the total solution of the system along with corresponding protocols of 3G and Wi-Fi.