{
  "number": 4916,
  "title": "Connected Identity in the Session Initiation Protocol (SIP)",
  "authors": [
    "J. Elwell"
  ],
  "published": "2007-06",
  "status": "Proposed Standard",
  "stream": "IETF",
  "area": "rai",
  "working_group": "sip",
  "pages": 24,
  "formats": [
    "TXT",
    "HTML"
  ],
  "abstract": "This document provides a means for a Session Initiation Protocol (SIP) User Agent (UA) that receives a dialog-forming request to supply its identity to the peer UA by means of a request in the reverse direction, and for that identity to be signed by an Authentication Service. Because of retargeting of a dialog-forming request (changing the value of the Request-URI), the UA that receives it (the User Agent Server, UAS) can have a different identity from that in the To header field. The same mechanism can be used to indicate a change of identity during a dialog, e.g., because of some action in the Public Switched Telephone Network (PSTN) behind a gateway. This document normatively updates RFC 3261 (SIP). [STANDARDS-TRACK]",
  "keywords": [
    "user agent",
    "ua",
    "application-layer",
    "application",
    "layer",
    "multimedia",
    "multicast",
    "unicast"
  ],
  "draft": "draft-ietf-sip-connected-identity-05",
  "doi": "10.17487/RFC4916",
  "updates": [
    "RFC3261"
  ],
  "urls": {
    "html": "https://rfc.dk/rfc4916/",
    "text": "https://rfc.dk/rfc4916.txt",
    "rfc_editor": "https://www.rfc-editor.org/rfc/rfc4916",
    "datatracker": "https://datatracker.ietf.org/doc/rfc4916/"
  },
  "text_modified": "2007-06-15T17:47:11Z"
}