Fast Re-Authentication Protocol for Inter-Domain Roaming

In this paper we introduce the Fast re-Authentication protocol (FAP) for inter-domain roaming, which aims to reduce authentication delay of a mobile user in a visited administrative domain. The approach eliminates the need of communication between the target and the user´s home networks for credentials verification and uses a short-living lightweight re-authentication ticket that does not require revocation mechanism. The proposed approach does not depend on the nature of roaming agreements between different networks.