Explains various methods used in cryptography and presents examples to help readers in breaking secret codes

This vintage book contains Alexander D’Agapeyeff’s famous 1939 work, Codes and Ciphers - A History of Cryptography. Cryptography is the employment of codes

The Secret Code Book is a short introduction to substitution ciphers. The chapters ease young readers into the concept of rotation ciphers and work their way up

Everything from smoke signals to military encryption devices Codes and Ciphers reveals the development and role of secret communications throughout history and

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