Re: [AVT] SRTP with layered encoding

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

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