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[liberationtech] WebRTC - The next big surveillance machine

elijah elijah at
Sun Apr 6 16:01:07 PDT 2014

carlo von lynX wrote:

> You can't diffie-hellman yourself out of a MITM. If the fundamental link
> is unsafe, you can make all the ephemeral keys you like - the observer can
> trace them all.

Tony Arcieri wrote:

> You should take a look at how ZRTP actually works, particularly Matt
> Green's analysis:
> ... Once this has been done successfully once, ZRTP stores some "continuity
> data" so the next time you authenticate to the same person, the previous
> authentication will ensure future connections are secured.

Patrick Schleizer wrote:

> The latter, the "continuity data" is implementation specific.
> I wonder how my voip clients actually support this.

This is an old thread, but this ietf draft is apropos:

It describes how you could use authenticate WebRTC streams using ZRTP
implemented in javascript, even with existing browsers that use DTLS-SRTP.


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