Codes and Ciphers: Julius Caesar, the Enigma, and the InternetThe design of code and cipher systems has undergone major changes in modern times. Powerful personal computers have resulted in an explosion of e banking, e commerce and e mail, and as a consequence the encryption of communications to ensure security has become a matter of public interest and importance. This book describes and analyzes many cipher systems ranging from the earliest and elementary to the most recent and sophisticated, such as RSA and