I attended and spoke at the Interop conference this week in Las Vegas. I love conferences in Las Vegas because I get to play poker, gamble, and take advantage of all of the other things you can do in this adult playground...
I presented on VoIP Security, along with David Endler. Our presentation was part of the "VoIP and Collaboration" track. Interop is a huge conference, with many tracks. It seems like this track however is growing every year. This is logical, considering how important the VoIP application is to networking nowadays. I included a copy of our presentation below:
We had a good crowd, maybe a 100 people if I remember correctly (I do a lot of these, so they blend together sometimes).
I attended some of the security and VoIP/collaboration sessions. There wasn't much discussion about VoIP security.
I also wandered around the exhibits. Of course Cisco, Avaya, Nortel, etc. were there talking about their systems. The various network vendors were also talking about VoIP. There was a separate security area, which honestly was pretty small, at least when compare to a security-focused show like RSA. There were only a couple of VoIP security-specific vendors there, including Borderware and VoIPShield. Borderware offers a SIP firewall called SipAssure. VoIPShield has a VoIP vulnerability scanner named VoIPAudit. They also announced some new services and some new products that will be available some time in the future.