Simson Garfinkel is a journalist, entrepreneur, and international authority on computer security. Garfinkel writes a weekly column for computer users, Simson Says, that appears in the print and online versions of The Boston Globe. Garfinkel is a frequent contributor to Wired Magazine, and his articles have appeared in more than 50 publications, including ComputerWorld, Forbes, The New York Times, and Technology Review. This is Garfinkel's ninth book. His other books include Architects of the Information Society, PGP: Pretty Good Privacy, Web Security & Commerce, Stopping Spam, and Practical Unix & Internet Security.