There is not a short or simple answer to this question. Several books have been written about British efforts to penetrate the German Enigma Codes during the Second World War. It began with the Polish government efforts in the months prior to the German invasion of Poland in September 1939. The Poles used several brilliant mathematicians working long hours to start. The British used mathematicians, early computers-like machines, and British made replicas of the Enigma cipher machines. It also required a very large number of Enigma coded radio transmissions that were intercepted (heard), recorded, and catalogued by the British. The idea was to discover a few letters or numbers that were encoded. To build on that knowledge to discover words & phrases, and then eventually sentences. The Enigma code actually changed often over the course of weeks. The British had to create a working machine that could accept all the identical changes (settings) made on the German machines and determine when & how to make the changed settings at the same time as the Germans. This took months & years of work. Sometimes a German Enigma machine or code book was captured that helped in the research. Sometimes the code was read for only a short time until the Germans changed the code (turned rotors & rearranged cable plugs) in their machines in a way that the British could not quickly duplicate. The code never stayed "cracked" and often only portions of German messages were decoded. It is a very complicated business, so often the most difficult mind-work ever done. Modern computers help a lot, but modern codes also use codes created by computers. Both sides use technology.
enigma
Turing did not work on the Enigma, it was a German machine. However he did do some work on the British Bombe machines that were used to crack the Enigma machine cipher. Later he saw Tommy Flowers' Colossus electronic computer, designed to crack the German Lorenz SZ40/42 machine cipher. This inspired him after the end of the war to begin work on programmable electronic computers.
The team of cryptologists at Bletchley Park, led by Alan Turing.
Perhaps you're thinking of the Bombe.
radar, enigma, and superior number of aricraft
enigma
The Enigma was used to decode the Enigma. The British decoders at Bletchley Park during the Second World War used brain-power to try to crack the German codes. That is, until they got their hands on an Enigma machine which the Polish had captured.
Turing did not work on the Enigma, it was a German machine. However he did do some work on the British Bombe machines that were used to crack the Enigma machine cipher. Later he saw Tommy Flowers' Colossus electronic computer, designed to crack the German Lorenz SZ40/42 machine cipher. This inspired him after the end of the war to begin work on programmable electronic computers.
Turing did not work on the Enigma, it was a German machine. However he did do some work on the British Bombe machines that were used to crack the Enigma machine cipher. Later he saw Tommy Flowers' Colossus electronic computer, designed to crack the German Lorenz SZ40/42 machine cipher. This inspired him after the end of the war to begin work on programmable electronic computers.
The Enigma was the Germans' and the Ultra was the British machine. Then the British from HMS Bulldog were the first to capture the Enigma Machine from the U-110 in the North Atlantic on May 9th 1941. Then Poland helped the British to decipher the code.
enigma
The team of cryptologists at Bletchley Park, led by Alan Turing.
The German Military code during World War II. The Germans thought that it couldn't be broken.
Perhaps you're thinking of the Bombe.
radar, enigma, and superior number of aricraft
I believe crew members off a British destroyer that had disabled a German submarine during WW2. The German crew was kept in isolation to insure the Germans did not learn that an enigma code machine had been captured by the British..........
The British at Bletchley Park broke the codes used by the German encryption machine known as "Enigma".