Publisher's Synopsis
A must-have book for secret agents in the making.
Ever wondered how to make and crack codes and ciphers? Herbie Brennan's essential guide contains everything a serious cryptographer and code-buster needs, including:
- Codebreaking methods, examples and tests
- How to develop complex ciphers
- Tools for encrypting messages, from invisible ink to computer pixels
- A history of how codes and ciphers have developed, taking in the ancient Greeks, the Kama Sutra, the Enigma machine and computer ciphers
And much, much more!
Contains black-and-white illustrations throughout.
