Spy Codes and Ciphers


Susan K. Mitchell

Book Details

Format: EPUB

Page count: 48 pages

File size: 3.6 MB

Protection: DRM

Language: English

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.