[asterisk-users] Encrypting the Conversation

[trixter aka Bret McDanel]

On Mon, 2006-07-10 at 07:34 -0500, Mike Bates wrote:
> Are you talking about ZiPhone a USB device ?
>  
> Mike
>  
zphone is phil zimmermans (creator of pgp) encrypted rtp system.  Unlike
SRTP this does not rely on the server itself to provide the encryption.
It also lets you be reasonably assured that if the numbers displayed
match then not only is no one listening now, but they havent since you
paired both endpoints.

There is a drawback that SRTP can solve however, zphone only works on
voip networks where the media proxy does not alter the data stream, it
cannot be used to bridge to different channel types and codecs.  This
means that if you want to call out on the PSTN, SRTP can encrypt over
the internet where zphone cannot. 

So it has its benefits, but also its drawbacks.


> 
-- 
Trixter http://www.0xdecafbad.com     Bret McDanel
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http://www.trxtel.com the VoIP provider that pays you!
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