Re: [AVT] SRTP with layered encoding

[Marc Petit-Huguenin <petithug at acm.org>]

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