RFC 3325: Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks

Publisher

IETF / RFC Editor

URL

https://www.rfc-editor.org/rfc/rfc3325.html

Published

2002-11-01

Updated

unknown

Accessed

2026-09-25

HTTP status

200

License

IETF Trust Legal Provisions; no-redistribution; short excerpts and locators only

Source notes citing this source

• Under RFC 3325 a proxy inserts P-Asserted-Identity after it has authenticated the originating user, for example with Digest authentication. in context
• A P-Asserted-Identity header carries at most two values, and if there are two, one must be a sip or sips URI and the other a tel URI. in context
• RFC 3325 limits P-Asserted-Identity to use inside a Trust Domain of SIP servers that are explicitly trusted to assert identity under shared policy. in context
• A user agent may send P-Preferred-Identity to a trusted proxy as a hint about which identity to assert, and the proxy must remove that header from any message it forwards. in context
• When the Privacy header contains the 'id' token, RFC 3325 requires proxies to remove all P-Asserted-Identity header fields before forwarding to elements that are not trusted. in context
• RFC 3325 is an Informational RFC published in November 2002, not a Standards Track specification. in context
• RFC 3325 defines P-Asserted-Identity for use among trusted SIP entities, typically intermediaries, to carry the identity of the sending user as verified by authentication. in context
• Under RFC 3325 a user requests identity privacy by including the 'id' token in the Privacy header, asking that P-Asserted-Identity be removed before the request leaves the Trust Domain. in context
• RFC 3325 relies on a Trust Domain whose members follow a documented specification, Spec(T), covering authentication, inter-node security, membership and default privacy handling. in context

Cite this source record

APA

WarmTransfer. (2002, November 1). RFC 3325: Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks. WarmTransfer. https://warmtransfer.net/knowledge/sources/rfc-3325-p-asserted-identity

BibTeX

@misc{warmtransfer-rfc-3325-p-asserted-identity,
  title  = {RFC 3325: Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks},
  author = {{WarmTransfer}},
  year   = {2002},
  url    = {https://warmtransfer.net/knowledge/sources/rfc-3325-p-asserted-identity},
  note   = {IETF / RFC Editor, accessed 2026-09-25}
}