Spy Codes and Ciphers
Interested in buying rights? Click here to make an offer

Rights Contact Login For More Details

More About This Title Spy Codes and Ciphers

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 kee
loading