Spy codes and ciphers
(2012)
Nonfiction
eBook
Details
PUBLISHED
[United States] : Enslow Publishing, LLC, 2012
Made available through hoopla
Made available through hoopla
DESCRIPTION
1 online resource
ISBN/ISSN
9780766046986 MWT15612546, 0766046982 15612546
LANGUAGE
English
NOTES
Can flashing lights send out a secret message? Did a famous spy use sketches of butterflies to hide messages? Can a digital photo hide a secret code? For centuries, spies have used many different ways to pass secret information. Codes and ciphers keep information safe from the enemy. Author Susan K. Mitchell uncovers the secrets to the amazing world of spy codes and ciphers
Mode of access: World Wide Web