Re: [AVT] SRTP with layered encoding

["Jonathan Lennox" <jonathan at vidyo.com>]

(Following up to myself.)

Which is to say, if you want to have some way to optimize EKT for the
multiple RTP session case, that's great; but I don't see any reason why
any mechanism shouldn't work equally well for multimedia as for layered
encodings.

-- 
Jonathan Lennox
Vidyo, Inc
jonathan at vidyo.com


> -----Original Message-----
> From: Jonathan Lennox [mailto:jonathan at vidyo.com]
> Sent: Tuesday, October 20, 2009 12:20 PM
> To: Marc Petit-Huguenin
> Cc: avt at ietf.org
> Subject: Re: [AVT] SRTP with layered encoding
> 
> What I guess I don't see is why layered encoding should be treated any
> differently than "ordinary" multimedia, e.g. separate audio and video
> sessions.
> 
> --
> Jonathan Lennox
> Vidyo, Inc
> jonathan at vidyo.com
> 
> 
> > -----Original Message-----
> > From: Marc Petit-Huguenin [mailto:petithug at acm.org]
> > Sent: Tuesday, October 20, 2009 12:11 PM
> > To: Jonathan Lennox
> > Cc: avt at ietf.org
> > Subject: Re: [AVT] SRTP with layered encoding
> >
> > Hi Jonathan,
> >
> > Jonathan Lennox wrote:
> > > I think that using different master keys for different RTP
sessions
> > is
> > > fairly essential for SRTP, to prevent two-time pad failures; I'd
be
> > > pretty concerned about breaking this.  Why do you want to?
> >
> > My proposal does not create two-time pad failures, as the layer
> number
> > would be
> > integrated in the label used to derive the sessions keys.
> >
> > This has the advantage to integrate nicely with EKT, as the EKT
> packets
> > would be
> > sent only on the RTCP packets of the base layer.
> >
> > --
> > Marc Petit-Huguenin
> > Personal email: marc at petit-huguenin.org
> > Professional email: petithug at acm.org
> > Blog: http://blog.marc.petit-huguenin.org
> _______________________________________________
> Audio/Video Transport Working Group
> avt at ietf.org
> https://www.ietf.org/mailman/listinfo/avt