Gokul Blog — A conversation on VoIP, IMS, Cisco and Just about Anything

Deeper analysis of VoIP

Voice over VoIP. Secure or Pain?

Posted by tggokul on July 4, 2007

Dan York in his blog talks about a new project by a Georgia Institute student which promotes embedding conversation in the voice data stream. Very interesting. .

As Dan nicely puts it they are using the available bandwidth in a G711 audio stream and embedding the G729 stream in it. Looks good for security purposes. But this is what I percieve would be the problem in real case scenarios. There are valid applications that need these details. For example Legal Intercept, Loggers etc.

The current IP Loggers ( voice recorders used to record RTP packets) would need to have knowledge about this and for this to happen the underlying signalling protocol has to have knowledge about this ( maybe through SDP). If that information is passed, your security issues starts all over again.

My verdict is that it is a very smart research paper, but to actually implement it would throw the existing systems into a spin.

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