Securing IM and P2P Applications for the Enterprise (SIAPAFTE) is a modern, well-written, thorough guide to instant messaging (IM) and peer-to-peer (P2P) networks and related security issues. I recommend all network and security administrators read this book. The Best of TaoSecurity Blog, Volume 4, is published by TaoSecurity.com, and is available on Amazon.com.com/TaoSecurity.com/The TaoSecurity.”]
Source: https://taosecurity.blogspot.com/2006/03/review-of-securing-im-and-p2p.html