Inter-domain Authentication and Authorization Mechanisms for Roaming SIP Users

: To enable users to utilize the services of various providers of multimedia services based on the session initiation protocol (SIP), some kind of interaction is required between the foreign provider and the home provider of the users. Such interaction is required for example to allow a user to utilize services provided by a foreign service provider while the user is on travel. In this paper we describe two possible approaches for exchanging authentication, authorization and accounting (AAA) information between foreign and home providers, namely: SIP dependent and independent inter-domain AAA communication. In the SIP dependent scenario, SIP is used as the communication protocol between the interacting providers and for carrying any information that needs to be exchanged between the providers. With the SIP independent scenario a special AAA protocol is used between the domains for exchanging AAA related information. Both approaches will be described in terms of message sequences that w...

• Type: Conference
• Year: 2004
• Where: WIS
• Authors: Dorgham Sisalem, Jiri Kuthan
• Keywords: Home Providers, Information Technology, SIP Dependent Scenario, SIP Independent Scenario, WIS 2004