Making and breaking secret messages from hieroglyphs to the Internet.

"Learn the fascinating world of codes--from deciphering ancient hieroglyphics to ciher machines used in the world wars to computer cryptology for encoding finan

Tells the stories of ninety-five situations in which code and hidden messages have been used throughout history.

An alphabetically organized encyclopedia that provides both a history of military communications and an assessment of current methods and applications. Military

History?s amazing secrets and codes?and how to crack them yourself. This fascinating look at history?s most mysterious messages is packed with puzzles to decode