Codes & ciphers
Subtitle: hundreds ofunusual and secret ways to send messages
By: Christina Ashton.
Publisher: Betterway Books
Published: 1993
Place of publication: Cincinnati, Ohio
Language: eng
Number of pages: 110
Subjects: Cryptography -- Juvenile literature.; Ciphers -- Juvenile literature.; Cryptography.; Ciphers.
Other titles: Codes and ciphers.
Description: Summary, Provides the history behind codes and ciphers as used in spying and explains how readers themselves can make and use their own secret codes.
Notes: Includes bibliographical references (p. 105) and index.