Hay Player

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 Book tell 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.