Bletchley Park is a Manoir in England, this place was the General headquarter British services of Renseignement during the Second world war. The Cryptologue S Alliés deciphered there the German messages coded with Enigma and the Machine of Lorenz. Profitable work of Alan Turing in Cryptanalyse will contribute in an undeniable way to the effort of war and the development of the Informatique, by the construction of Colossus, the first Ordinateur.

History

Following work of the Mathematician S Polish Marian Rejewski, Jerzy Różycki and Henryk Zygalski which broke the German code of Enigma in 1933 and it transmitted in 1939 (five weeks before the beginning of war) to the Britannique S and with the French, with the beginning of the year 1940, a team of 7.000 people worked the German messages quantified to the electromechanical machine Enigma. This army, gathered in great secrecy with Bletchley Park, the North-West of London. The geographical location does not result from the chance because the city is located at equal distance from the towns of Oxford and Cambridge, seat of both more prestigious Université S of the country. The Cryptologue S of Bletchley Park are provided with enormous means for the time, the bombs , of the Ordinateur S electromechanical S especially conceived for the Cryptanalyse.

The team of Bletchley Park joins together Mathématicien S, Linguiste S, scholar S in any kind like six Cruciverbiste S virtuosos, recruited under cover of a contest organized in 1942 by the Daily Telegraph. The operation takes the name of Ultra. This formidable machinery, placed under the orders of Alan Turing, makes it possible the Alliés to take note of the German projects and the movements of their troops. It should be noted that all collected information was not used for fear the Germans realize that them Enigma machine was not any more sure and that they still complicate their system. Many allied lives, in particular those of the sailors of the convoys which crossed the Atlantique, were thus sacrificed to cover the operations of the Cipher office.

The activities with Bletchley Park proceeded in the most strict secrecy, any distorsion with the payment was liable to the Capital punishment.

internal bond

• Cryptanalyse d' Enigma
• Biuro Szyfrów

external bonds

• How Mathematicians Helped Win WWII - National Security Agency

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