Title: Codemaster
First published: 1990
Description: This practical field manual is designed to teach combat and survival professionals, as well as hobbyists, the basic mechanics of enciphering and deciphering messages. Includes everything from the simplest paper-and-pencil ciphers to state-of-the-art computer systems used by governments and militaries.
Subjects: Ciphers
LC classification: Z104 .N5 1990