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

 

> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On 
> Behalf Of Dean Willis
> Sent: Thursday, April 02, 2009 8:50 PM
> To: Jiri Kuthan
> Cc: SIP List; Uzelac, Adam
> Subject: Re: [Sip] francois' comments and why RFC4474 not 
> used in the field
> 
> 
> On Apr 1, 2009, at 5:46 PM, Jiri Kuthan wrote:
> 
> > Dean Willis wrote:
> >> On Mar 30, 2009, at 8:03 PM, Jiri Kuthan wrote:
> >>>
> >>> There is a timing aspect in favor of placing identity in 
> signaling  
> >>> --
> >>> I would like to know whose call is ringing before I answer (if I  
> >>> do).
> >> So, we need identity in signaling, we need identity in media, and  
> >> we need the two identity expressions to match.
> >
> > I'm personally happy with having it only in signaling. Should there
> > be some in media too, I would be in favor of keeping those two
> > separate -- I'm not a particular fan of protocol dependencies.
> > That's just not about aesthetic expression -- once a protocol
> > begins to depend on other protocol, which one possibly does not
> > need, the cost and adaptability decreases. Single-purpose
> > things without dependencies have a much sounder chance of
> > deployment.
> >
> 
> So you're okay with knowing who dialed you, but not knowing who you  
> are actually talking to?
> 
> Personally, I want something that at least correlates the signaling  
> and media streams.

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.

-d

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