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

Hi Colin,

how does this milestone sound?  "December 2007 Submit TLS-SRTP for  
Proposed Standard"   Perhaps I'm aggressive in expecting us to have  
the draft ready before the Vancouver meeting; we could push it back  
to March 2008.

David

On Jun 26, 2007, at 4:00 AM, Colin Perkins wrote:

> 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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