Un-true story.

Rating: 3/10 (9 February 2015)

I really don't understand why ppl are so excited about that movie. Mr. Turing didn't crack the Enigma CODE ! They mention only once "POLISH" that they did some sort of poor cracking device machine ? Bunch of lier's. Made Brits hero's. Who don't know history will believe straight away in all that crap which was showed in that movie. The only real thing was the Enigma it self. So read this little past of history proved by facts! German military messages enciphered on the Enigma machine were first broken by the "Polish Cipher Bureau, beginning in December 1932" This success was a result of efforts by three Polish cryptologist's, Marian Rejewski, Jerzy Różycki and Henryk Zygalski, working for Polish military intelligence. Rejewski reverse engineered the device, using theoretical mathematics and material supplied by French military intelligence. Subsequently the three mathematicians designed mechanical devices for breaking Enigma ciphers, including the cryptologic bomb. From 1938 onwards, additional complexity was repeatedly added to the Enigma machines, making decryption more difficult and requiring larger numbers of equipment and personnel--more than the Poles could readily produce.
On 25 July 1939, in Warsaw, the Poles initiated French and British military intelligence representatives into their Enigma-decryption techniques and equipment, including Zygalski sheets and the cryptologic bomb, and promised each delegation a Polish-reconstructed Enigma. The demonstration represented a vital basis for the later British continuation and effort. During the war, British cryptologist's decrypted a vast number of messages enciphered on Enigma. The intelligence gleaned from this source, codenamed "Ultra" by the British, was a substantial aid to the Allied war effort.
Though Enigma had some cryptographic weaknesses, in practice it was German procedural flaws, operator mistakes, laziness, failure to systematically introduce changes in encipherment procedures, and Allied capture of key tables and hardware that, during the war, enabled Allied cryptologist's to succeed.