The Codebreakers: The Comprehensive History of Secret Communication from Ancient Times to the Internet (Hardcover, Revised) - The Story of Secret Writing

Traces the history of secret codes since the time of the pharoahs, and discusses the impact of codes and codebreaking on human historyAn updated and revised history of codes offers new information on techniques used to break machine and computer ciphers, as well as the speculation of scientists on how messages from outer space might be solved and a study of the use of codes during the Vietnam War.