So after writing my response to Paul Kyzivat's response to Cullen, I thought about it some more and realized that I ought to collect those thoughts into an I-D, which I have now submitted. I did so primarily because I haven't really seen discussion of the end user's *experience* of working with "trusted identity" (if I missed such a discussion, please feel free to point it out to me). To the person using a SIP phone to call another SIP phone, how do they know that they can trust the identity of the caller on the other end? If we solve the various issues we are discussing related to RFC 4474, P-A-I, etc., what might the end user experience look like?

As I note in the draft, it's not entirely clear to me that the IETF is the appropriate body to address this question. It's more of a "user interface" question that is more about how to have users adopt/accept a SIP feature and feels to me like it's something more appropriate for a more vendor-centric "industry consortium" type of entity. Something like the SIP Forum or some other similar entity. I'm certainly open to comments and feedback along those lines... In the meantime, I thought I'd at least throw something out there for discussion.

Thanks,
Dan

A New Internet-Draft is available from the on-line Internet-Drafts directories.

Title : The Importance of a Visual Identifier of Trusted Identity
        Author(s)       : D. York
Filename : draft-york-sip-visual-identifier-trusted- identity-00.txt
        Pages           : 9
        Date            : 2008-07-07

This document discusses the need for a visual identifier in Session
Initiation Protocol (SIP) endpoints to indicate to the end user that
they are speaking with someone whose identity is trusted.

A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-york-sip-visual-identifier-trusted-identity-00.txt

--
Dan York, CISSP, Director of Emerging Communication Technology
Office of the CTO    Voxeo Corporation     [EMAIL PROTECTED]
Phone: +1-407-455-5859  Skype: danyork  http://www.voxeo.com
Blogs: http://blogs.voxeo.com  http://www.disruptivetelephony.com

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