Re: francois' comments and why RFC4474 not used in the field

"Dan Wing" <[email protected]>
Newsgroups gmane.ietf.sip
Message-ID <[email protected]>
> > All 5 techniques described in
> > 
> http://tools.ietf.org/html/draft-wing-sip-identity-media-02#section-4
> > accomplish that using TLS, DTLS-SRTP, ICE, HIP, or ZRTP -- 
> > any of those choices has different tradeoffs.
> 
> I'm puzzled by why we would do anything but the DTLS-SRTP 
> (and TLS for TCP traffic).

I also prefer TLS.  RFC4474 doesn't require TLS, so ICE is in the draft to
demonstrate it is possible to have identity even through a translator and have
identity with just RTP (RFC4474 provides identity with just RTP).

However, if we used TLS/DTLS-SRTP for identity it would (a) break transcoding
(as discussed) and (b) require deploying SRTP.  If doubt we are willing to do
(a) and (b).

-d

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