Re: [rtcweb] draft-ietf-rtcweb-rtp-usage-12 Client-to-Mixer Audio Level

"Matthew Kaufman (SKYPE)" <matthew.kaufman@skype.net> Wed, 05 March 2014 16:35 UTC

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From: "Matthew Kaufman (SKYPE)" <matthew.kaufman@skype.net>
To: Sergio Garcia Murillo <sergio.garcia.murillo@gmail.com>
Thread-Topic: [rtcweb] draft-ietf-rtcweb-rtp-usage-12 Client-to-Mixer Audio Level
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Date: Wed, 5 Mar 2014 16:34:32 +0000
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Subject: Re: [rtcweb] draft-ietf-rtcweb-rtp-usage-12 Client-to-Mixer Audio Level
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EKT is one possible answer to this concern.

By the way: If and when we specify EKT for RTCWEB, there is a simple rule we should establish: A "browser" must not initiate the use of EKT. That way, browser to browser sessions would be unable to force a known key... That could only happen when talking to non-browser endpoints (likely mixers)

Matthew Kaufman

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> On Mar 5, 2014, at 8:23 AM, "Sergio Garcia Murillo" <sergio.garcia.murillo@gmail.com> wrote:
> 
> El 05/03/2014 16:45, Jonathan Lennox escribió:
>> 
>> That said, I’m not sure I believe in Cullen’s use case — there’s too much other information that this unauthorized conference mixer wouldn’t be able to do.  (e.g., request I-frames, or detect them, for switching; or generate proper RTCP reports for sometimes-on streams). 
> 
> I have deeper doubts, I don't really know how a RTP router/mixer would be able to work without acting as DTLS endpoint and decripting/encripting the RTP data.  Or is there a way to setup/share a DTLS session between more than two peers so the same DTLS/SRTP packet is decriptable by more than one receiver?
> 
> Best regards
> Sergio
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