"Hacking VoIP is a practical guide for evaluating and testing VoIP implementation in your enterprise. I liked the concept where the author focused just on 'upper scale' deployments, making the book perfect for the system administrators that are getting deeper into the world of securing VoIP."
—(IN)SECURE Magazine (Download the March 2009 issue here)
"With VoIP rapidly proving to be a very cost-effective alternative to closed, proprietary network solutions, it is also shaping up to become the next white and black hacker battleground. Reading Himanshu's book supplies a meaningful education on the positive and negative opportunities that the technology can deliver developers, security professionals and users alike."
—Dr. Dobb's CodeTalk (Read More)
"With a focused audience and a clear goal, the book does justice to a technology moving towards maturity even as it finds a growing acceptance in the enterprise."
—Desicritics.org (Read More)
"I've never really thought about the subject and this book was a great introduction--not too light and a good read. I highly recommend it if you are remotely interested in the subject."
—misfitgeek.com (Read More)
"Hacking VoIP is an informative and well-organized book that will appeal to readers already familiar with VoIP...As computer books go, this is an enjoyable read."
—The Tech Static (Read More)
"The book provides a good background on the VoIP protocols themselves, and Dwivedi does an excellent job of explaining the weaknesses and exploits. VoIP admins should read this book and follow Dwivedi's advice to protect their VoIP environments."
—Tony Bradley, About.com (Read More)
"The content is . . . presented clearly with excellent wording and just enough detail to get me started."
—Kramses blog (Read More)