Biuro Szyfrów ( " Office of the chiffre" ) was a Polish information agency which worked for the Polish military intelligence. It contributed to break the day before Second world war the German code Enigma.

May 8th, 1919, a section of cryptography of the Polish army was consisted lieutenant Józef Stanslicki, and a few months later were named " Biuro Szyfrów" (the office of figures). It contributed appreciably to the defeat of the Soviets by Pilsudski during the Russo-Polish Guerre in 1920, because Soviet military cryptography was not very robust at this period. Later, the German communications became its target priritaire; " BS-4" was the section treating of the German figures, directed by Maksymilian Cięźki.

Ciezki engaged three young mathematicians in the Thirties: Jerzy Różycki, Henryk Zygalski and Marian Rejewski. In 1932, Rejewski carried out one of the greatest advances in the history of cryptography by applying methods of pure mathematics to the new cryptographic system of the German army, Enigma . The inescapable war and the defeat of the foreseeable Poland led to the decision of evacuation of the major part of the personnel of Biuro towards the France where the Polish cryptographes worked for the French intelligence. The attack of France pushed the officers who have escaped with the internment by the Régime of Vichy towards British Isles.

See too

• Cryptanalyse d' Enigma
• Marian Rejewski
• Henryk Zygalski
• Jerzy Różycki

External bond

• Enigma and the intelligence service
• Biuro Szyfrów
• " Polish Enigma Double"
• Butt the Enigma (National Security Agency)
• " The Enigma Codes Breach" by [[Jan Bury]]
• The „Enigma” and the Intelligence
• www.enigmahistory.org
• " Codebreaking and Secret Weapons in World War II" By Bill Momsen
• has off Brief History Computing Technology, 1930 to 1939