

An edition of Codes, Ciphers and Secret Writing (1972)
By Martin Gardner
Publish Date
1974
Publisher
Pocket Books
Language
eng
Pages
105
Description:
Explains in simple terms how to encode and decode messages in various ciphers, describes coding machines, and gives formulas for invisible ink.
subjects: Ciphers, Juvenile literature, Cryptography, Cryptography., Ciphers., Signs and symbols, Writing