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Journal of Inforamtion Science and Engineering, Vol.15 No.4, pp.505-520 (July 1999)
An Efficient Authentication Protocol for Mobile Networks*

Shiuh-Pyng Shieh, Fu-Shen Ho and Yu-Lun Huang
Department of Computer Science and Information Engineering
National Chiao Tung University
Hsinchu, Taiwan 300, R.O.C.

Many existing authentication protocols supporting inter-domain authentication on the Internet require their clients to communicate with every involved key distribution center (KDC) directly. This is inefficient and costly when the client side is a wireless mobile unit, for wireless transmission has relatively lower bandwidth, and a mobile unit is battery powered. In this paper, we present a mobile authentication protocol which only needs seven messages for inter-domain initial authentication regardless of the number of hops transited between the visited and home domains; four messages for subsequent authentication when the mobile user requests a different service provided by the visited domain; and two messages when the same service is requested again. With the enhanced version of BAN logic we propose, it is proved that our protocol can achieve more goals of authentication than those required by the original BAN logic.

Keywords: mobile networking, network security, authentication, mobile computing, inter-domain authentication

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Received August 4, 1997; accepted March 10, 1998.
Communicated by Jieh Hsiang.
* This work was supported in part by the National Science Council, Taiwan, R.O.C., under Grant NSC 86-2622-E009-007R.