I have reviewed this document as part of the security directorate's ongoing effort to review all IETF documents being processed by the IESG. These comments were written primarily for the benefit of the security area directors. Document editors and WG chairs should treat these comments just like any other last call comments. I found no security problems with this draft. A couple of nits: section 4.1, paragraph 1 says "New tel URI parameters and new values for existing tel URI parameters MUST be registered by IANA" but I think it should be "New tel URI parameters and new values for existing tel URI parameters MUST be registered with IANA"; section 5, last sentence says "The supporting RFC publications for parameter registrations described this specification MUST provide detailed security considerations for them." but it seems like there is at least one word missing after "described" -- maybe "described in"? _______________________________________________ IETF mailing list IETF@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf