01416cam a2200349 4500 138316000 TxAuBib 20091023120000.0 080304s2008||||||||||||||||||||||||eng|u 2008010029 9781595665942 lib. bdg. 1595665943 lib. bdg. (OCoLC)212909056 DLC DLC ICrlF TxAuBib Gilbert, Adrian. Codes and ciphers / Adrian Gilbert. Laguna Hills, CA : QEB Pub., 2008. 32 p. : ill. (some col.) ; 31 cm. Spy files Includes index. Codes and ciphers -- The Caesar cipher -- Code breaking -- Morse code -- Visual codes -- Navajo code talkers -- One-time pads -- Cipher machines -- Purple intelligence -- Enigma -- Secret writing -- Microdots -- Radio communications. Discusses the difference between codes and ciphers, examines common codes and ciphers that have been used during wars, and explains how to create simple ciphers. 5.9 Follett Library Resources. 3-6 Follett Library Resources. AR. Ciphers Juvenile literature. Ciphers. Cryptography Juvenile literature. Cryptography. Spy files. TXGLA