If you are a Facebook user, I'd love it if you also became a "fan" of the book's page there:
My goal with the book was to put in printed form much of what we've discussed on Blue Box over the many years and what I talk about in presentations with regard to how you secure a communications system when it is distributed globally and all based on IP communication. As I discussed in this video, I was not trying to create yet another book on "VoIP security", although that is discussed, but rather to look at a slightly higher level at what happens when you are using voice, video, instant messaging, presence and other forms of collaboration.
I've been very pleased by the comments I've heard so far on the book... and if you work with communications systems, please do check out the book and let me know what you think! Thanks!