"Discusses different methods for breaking secret codes"--Provided by publisher.

This unique book explains the basic issues of classical and modern cryptography, and provides a self contained essential mathematical background in number theor

"Discusses different methods for speaking secret codes"--Provided by publisher.

"As gripping as a good thriller." --The Washington Post Unpack the science of secrecy and discover the methods behind cryptography--the encoding and decoding of

Covert communications have won or lost wars, exposed political intrigue, disguised secret religions and societies, and secured financial transactions. This imme