by Mango, Karin N.
[ 01. English Non Fiction ] Series: A First book Published by : F. Watts, (New York :) Physical details: 93 p. : ill. ; 23 cm. Subject(s): Cryptography --Juvenile literature. | Ciphers --Juvenile literature. | Cryptography. | Ciphers. Year : 1988
Item type :
01. English Non Fiction
| Location | Call Number | Serial Data | Published | Status | Date Due |
|---|---|---|---|---|---|
| Birchwood Intermediate School | 652.8 MAN | Available |
Includes index.
Bibliography: p. 87-88.
Describes the many ways of hiding the real meaning of what someone is trying to say by using a code or replacing the message with a cipher.