Re: VOIP: RTP vs SRTP

[Sebastien Tricaud <sebastien.tricaud () wengo fr>]

defragz () hotmail com wrote:
> Hello list,
>
> Planning some internal presentations on VoIP, I was wondering if SRTP (Secure Real Time Protocol) is now really in use, as a secure replacement of RTP. 
>
>   
It starts to be used, but this is not widely used yet unfortunately. 
Even though SRTP is a move ahead, it still allows man in the middle 
attacks.
Philip Zimmermann and Alan Johnston have written ZRTP, a spec available 
at http://www.philzimmermann.com/EN/zfone/index.html
ZRTP is a SRTP like, using a ZID key to protect man in the middle 
attacks... among other improvements.


> More generally, from your experience, and from what you have seen in "real life", do you thing that VoIP security is 
> getting better? Do people use crypto to protect both data and signalling?
> I will love to hear your feedbacks...
>   

Usually crypto is mostly used to protect RTP data. SIPS is here for 
signaling issues, but again, this is not widely used.
In real life, VoIP security is getting better, but this is fairly new. 
2006 is known as the VoIP security year, I hope that will be the case in 
real life.

If you have other more advanced questions about VoIP security in 
general, you can also try reaching this mailing list:
http://voipsa.org/mailman/listinfo/voipsec_voipsa.org

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