BRUCE SCHNEIER is an internationally renowned security technologist who studies the human side of security. A prolific author, he has written hundreds of articles, essays, and academic papers, as well as eleven books that together have sold more than 400,000 copies. He has testified before Congress, is a frequent guest on television and radio, and is regularly quoted in the press. His blog and monthly newsletter at www.schneier.com reach over 250,000 devoted readers worldwide.