RFC 3324 (rfc3324) - Page 3 of 11
Short Term Requirements for Network Asserted Identity
Alternative Format: Original Text Document
RFC 3324 Requirements for Network Asserted Identity November 2002
Such a network is described in this document as a Trust Domain and we
present a strict definition of trust and Trust Domain for the
purposes of this document. These short-term requirements provide
only for the exchange of Network Asserted Identity within a Trust
Domain and to an entity directly connected to the trust domain.
General requirements for transport of Network Asserted Identities on
the Internet are out of scope of this document.
2. Definitions
2.1 Identity
An Identity, for the purposes of this document, is a sip:, sips: or
tel: URI, and optionally a Display Name.
The URI MUST be meaningful to the domain identified in the URI (in
the case of sip: or sips: URIs) or the owner of the E.164 number (in
the case of tel: URIs), in the sense that when used as a SIP
Request-URI in a request sent to that domain/number range owner, it
would cause the request to be routed to the user/line that is
associated with the identity, or to be processed by service logic
running on that user's behalf.
If the URI is a sip: or sips: URI, then depending on the local policy
of the domain identified in the URI, the URI MAY identify some
specific entity, such as a person.
If the URI is a tel: URI, then depending on the local policy of the
owner of the number range within which the telephone number lies, the
number MAY identify some specific entity, such as a telephone line.
However, it should be noted that identifying the owner of the number
range is a less straightforward process than identifying the domain
which owns a sip: or sips: URI.
2.2 Network Asserted Identity
A Network Asserted Identity is an identity derived by a SIP network
entity as a result of an authentication process, which identifies the
authenticated entity in the sense defined in Section 2.1.
In the case of a sip: or sips: URI, the domain included in the URI
MUST be within the Trust Domain.
In the case of a tel: URI, the owner of the E.164 number in the URI
MUST be within the Trust Domain.
Watson Informational