Langley, Andrew.

Codes and codebreaking / Andrew Langley. - Mankato, MN : Smart Apple Media, c2010. - 32 p. : col. ill. ; 30 cm. - Spies and spying .

Includes index.

Sending secrets -- Ancient secrets -- Ciphers and plotters -- Mighty machines -- Purple and enigma cipher machines -- The code talkers -- Using codes today.

ISBN: 9781599203577

LCCN: 2008055503

Subjects--Topical Terms:
Cryptography--History.
Ciphers--History.

LC Class. No.: Z103.3 / .L36 2010

Dewey Class. No.: 652/.8