Whose work cracked the Enigma code?

During World War II, mathematician Alan Turing played a central role at Britain’s secret codebreaking center, Bletchley Park, in cracking the German Enigma machine — a device that encrypted military communications in trillions of possible ways. Building on earlier Polish work, Turing designed an electromechanical machine called the Bombe that could rapidly test settings and decode messages. The intelligence gained, codenamed Ultra, is credited with shortening the war by an estimated two years and saving countless lives. Turing is also considered a founder of computer science and artificial intelligence, having conceived the theoretical “Turing machine” and the famous Turing Test.