On May 10, 2013, at 10:37 AM, Olle E. Johansson <[email protected]> wrote:

> 
> 10 maj 2013 kl. 17:40 skrev Paul Hoffman <[email protected]>:
> 
>> On May 10, 2013, at 5:14 AM, Olle E. Johansson <[email protected]> wrote:
>> 
>>> This draft only talks about "Mail user agents" but as far as I see it it 
>>> applies to SIP user agents as well.
>> 
>> Nope, it only applies to MUAs.
>> 
>>> One difference is that in a SIP uri, the username part is optional:
>>> 
>>> sip:[email protected]
>>> sip:conference.example.com
>> 
>> Yes, exactly.
>> 
>>> Are both valid URI's. But that doesn't seem to make much of a difference. 
>>> The records would become:
>>> 
>>> MNUHE2LT._smimecert.example.com
>>> _smimecert.conference.example.com
>>> 
>>> Would it make sense to incorporate SIP into this draft?
>> 
>> I don't think so. It would be better to do that as a separate document with 
>> separate considerations for the SIP protocol.
> 
> Ok.
> 
> Can the "_smimecert" tag be used for this as well or should this be exclusive 
> for S/MIME-Email?


XMPP could also benefit from something very much like this, forTLS mutual auth, 
E2E, etc.  From my reading, I think there are just enough semantic differences 
that _smimecert is probably not resuable for us, and I suspect the same is true 
for SIP.

However, the syntax is going to be nearly identical, so maybe we can find some 
common ground to build on?


- m&m

Matt Miller < [email protected] >
Cisco Systems, Inc.

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