The handwritten workings were used to insulate the unheated huts where chilly Turing and his colleagues raced to break enemy codes.
Estimated to have taken two years off WWII, saving countless lives, the code and cipherbreaking of Bletchley Park was instrumental to the Allies' win. Here's a photo tour of this once-secret pantheon of codebreaking, and the birthplace of the modern computer.
The next installment in a mysterious scavenger hunt that's baffled the Internet may have been posted online.
Vilified by the British government for his homosexuality -- a fact that many say led to his suicide -- the famous mathematician and Enigma code-breaker is now likely to receive a posthumous pardon.
The father of modern computing is to be granted a posthumous pardon, thanks to a backbench bill tabled for the end of October.
Road Trip 2010: CNET reporter Daniel Terdiman stops in on the National Cryptologic Museum and sees a bit of the history of codes and codebreaking.
A rebuilt Colossus, a cipher-breaking machine used in World War II, is being pitted against modern computers in a race to break encrypted code. Photos: A 'Cipher Challenge' for Colossus
A small Florida-based company must stop making software that allows users to "unlock" safeguards against piracy and make illicit copies.