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