Mr. Hoffman is one of the world's leading mobile security experts, with over 15 years direct experience securing mobile technologies. He is well-known for his live hacking demonstrations, videos and security articles, many of which have been included into the curriculum of Universities throughout the world. His book "Blackjacking: Security Threats to BlackBerry Devices, PDAs, and Cell Phones in the Enterprise" (Wiley 2007) is the most comprehensive guide available for securing mobile device-related threats. He is also author of "Implementing NAP and NAC Security Technologies: The Complete Guide to Network Access Control" (Wiley 2008). Dan is a Certified Information Systems Security Professional (CISSP), a Certified Ethical Hacker (CEH) and a Certified Hacking Forensic Investigator (CHFI).