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Andrew Hodges, Simon Singh
Bletchley Park, Enigma and the Anonymous Heroes of Cryptography
Hay Festival 2000
Alan Turing's biographer and the author of The Code Booktell the stories behind some of the most secret code-breaking achievements in history, including Alan Turing's cracking of the German Enigma cipher and Charles Babbage's decipherment of the supposedly unbreakable Vigenere cipher.