[guardian-dev] Blog post: VoIP Security Architecture

Aaron Lux a at AaronLux.com
Thu Nov 28 21:17:39 EST 2013

If you are concerned any past OSTel ZRTP calls were MitM'ed you can meet
with your callee and share keys.  If they don't match then you were
MitM'ed.  If they do match then you will not only be able to trust all
past conversations but also future converstaions with that user. 
Relying on recognition of voice is a poor security, reduces privacy, and
causes voice changers to be rendered ineffectual.

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