[AVT] Re: TLS-SRTP internet draft as a WG item in AVT

Hi David,

What milestone(s) do you see this work adding to the AVT charter, if  
accepted?

Colin

On 20 Jun 2007, at 21:54, David McGrew wrote:
> Hi Colin, Roni, and Tom,
>
> I would like to ask that draft-mcgrew-tls-srtp be taken up as a  
> working group action item in AVT, as part the plan for carrying  
> forward the RTPSEC work (as per Cullen's email of May 11 to the  
> rtpsec list).   I would like to continue on as an author of this  
> work, and Eric as agreed to do the same.  There are a small number  
> of minor open issues which I expect can be wrapped up quickly:
>
> 1.  The draft needs to be clarified so that, in the Symmetric RTP  
> case, only one handshake is needed.
>
> 2.  Section 3.6.2.1 needs to be resolved to either decide on a  
> "symmetry breaking" rule or not.  It may be desirable to have such  
> a rule to handle cases in which the signaling system can't tell a  
> device which should act as client and which should act as server.    
> This would allow opportunistic probing, i.e. a TLS-SRTP  
> implementation could attempt to find out whether another RTP  
> implementation supports TLS-SRTP, absent any help from signaling.
>
> 3.  The "single DTLS session per SRTP session" issue needs to be  
> decided, and Appendix A should then be removed from the draft.
>
> 4.  It should be decided to use, or not to use the "TLS Extractor",  
> and Section 3.3 should be rewritten accordingly.
>
> 5.  The duplicate list of srtp profiles needs to be eliminated.
>
> Best regards,
>
> David
>
> --
>
> p.s. - here's the AVT-specific part of Cullen note, so that you  
> don't need to dig it out of your mailbox: "AVT - Describe how DTLS  
> is used to key SRTP and how SRTP is used in combination with DTLS.  
> This includes the issues of multiplexing DTLS and SRTP on one port.  
> draft-mcgrew-tls-srtp will be the starting draft for this."

-- 
Colin Perkins
http://csperkins.org/

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