WOWMOM '99 Proceedings of the 2nd ACM international workshop on Wireless mobile multimedia
Application-layer mobility using SIP
ACM SIGMOBILE Mobile Computing and Communications Review
Digital Identity based VoIP Authentication Mechanism
Proceedings of International Conference on Advances in Mobile Computing & Multimedia
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Identity Federation enables managing a single User's multiple Identities across administrative domains. Instead of forcing a single Identity for the User, it leverages trust between Service Providers to share User Identity information viz. Authentication, Authorization and Attributedetails. Users can federate their multiple Identities at different domains, for combined cross-domain benefits such as Single Sign On(SSO) on the Internet. In this paper, we analyze and present how the power of Identity Federation can be used within VoIP, to offer a more flexible and capable service environment to the User. Also, Identity Federationcan save VoIP, from any impending challenges of "Identity multiplicity" arising from the presence of numerous Service Providers. We select the Session Initiation Protocol (SIP) and argue that in order to achieve its true potential of a pervasive VoIP platform, SIP needs a way for supporting "mobility across multiple User Identities". The paperanalyzes differences in introducing Identity Federation for VoIP, as compared to HTTP-based services and identifies additional benefits that are possible for VoIP entities. An important aspect is that of user control over Identity Federation enablement and usage, keeping in line with the SIP design philosophy. We propose a user-controlled Identity Federation sub-layer within SIP, so that federation benefitscan be leveraged to all kinds of multimedia applications. We also present a set of exemplary yet novel use-cases enabled by the framework.