Authentication and key generation for mobile IP using GSM authentication and roaming

A new authentication, authorization and accounting (AAA) infrastructure for use on the Internet is being developed at the IETF. AAA support is also being specified for mobile IP. The paper describes an implemented prototype system that demonstrates how the existing GSM authentication and operator roaming infrastructure can be used for mobile IP authentication and key distribution. We present a mechanism for authenticating the user and generating mobile IP authentication keys using the GSM subscriber identity module (SIM). The Internet AAA network has an interface to the GSM network for obtaining authentication information from the GSM Authentication Centre (AuC). After the authentication keys have been generated, the default mobile IP authentication with these keys is used for several subsequent registrations