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E.164 Ownership using Public Keys stored in ENUM

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Klaus Darilion , Hannes Tschofenig
Last updated 2008-02-18
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


To determine which domain is allowed to claim ownership of a certain telephone number is difficult. This may cause problems when to authenticate endpoints that use telephone number URIs and domain names in their From address. This document investigates a proposal that stores a public key below the corresponding ENUM tree in the DNS. The verifier can determine ownership by performing an ENUM lookup to retrieve the public key from the DNS and to use it for verifying the signature created as part of the SIP Identity mechanism. This document is a contribution to the ongoing discussion on RFC 4474 when used in combination with E.164 numbers.


Klaus Darilion
Hannes Tschofenig

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)