Bletchley Park's Secret Room: The Centre of Britain's Wartime Code-Breaking

In 1940 a small band of academics was hired by a secret department of the Foreign Office. For the rest of the Second World War, they controlled the interception of enemy radio communications, broke most of the great bulk of intercepted secret enciphered messages, and passed on their contents to Churchill and the concerned command within a few hours, and sometimes a few minutes, of their interception.Bletchley Park’s Secret Room is a posthumous account of the secret code-breaking process in ...