De/Cipher

De/cipher by Mark Frary is a modern day history of hacking, covering ancient transposition ciphers and methods of steganography through later advances, such as polyalphabetic systems.

This book looks at 45 of the world’s most important codes and ciphers, like the Great Cipher to the secure hash algorithm used today to verify online digital signatures.

“Whether you are sending messages from behind enemy lines or

hiding codes in cat memes, ciphers have been used to deliver

secret messages for centuries – here are some of the most mind-

boggling.”

– BBC Science

“A delightful little book … an ideal introduction”

– Popular Science

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