%% You should probably cite draft-ietf-sipcore-sip-token-authnz instead of this I-D. @techreport{ietf-sipcore-sip-authn-02, number = {draft-ietf-sipcore-sip-authn-02}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-sipcore-sip-authn/02/}, author = {Rifaat Shekh-Yusef and Christer Holmberg and Victor Pascual}, title = {{Third-Party Authentication for Session Initiation Protocol (SIP)}}, pagetotal = 17, year = 2018, month = feb, day = 5, abstract = {This document defines an authentication mechanism for SIP, that is based on the OAuth 2.0 and OpenID Connect Core 1.0 specifications, to enable the delegation of the user authentication to a dedicated third-party IdP entity that is separate from the SIP network elements that provide the SIP service.}, }