All you have to do is watch the news, or be warned not to open your email today, to recognize the necessity for this revised and enhanced edition of this critical work, first published in 1995. We are inundated daily with intellectual property issues and warnings against computer viruses and hackers. Government and law enforcement agency involvement in the security of our computer systems leaves us vulnerable to abuse of privacy, and raises the specter of -Big Brother-. Also, many critical systems controlled by computers, such as nuclear power facilities and missile defense systems, are often...