The Germans used a device called the Enigma Machine. This Enigma Code was thought to be unbreakable, but the Poles had some success, and later the British would take it even further.

Alan Turing, a British computer scientist, was very influential and he was critical in helping to decipher German Enigma-machine-encrypted signals during World War II. He helped to create the Bombe. Turing was an eccentric gentleman and was very talented.

Located in the town of Bletchley, in Milton Keynes, Buckinghamshire, England, there was “the site of the United Kingdom’s main decryption establishment, the Government Code and Cypher School (GC&CS), where ciphers and codes of several Axis countries were decrypted.” This site was called Bletchley Park.

Churchill referred to the Bletchley staff as “The geese that laid the golden eggs and never cackled”.

British codebreakers used Colossus computers during World War II to help in the cryptanalysis department. Colossus was the world’s first electronic digital computer that was at all programmable.