Marian Rejewski, Jerzy Rozycki, Henryk Zygalski and other cryptoanalysts from BS4, broke into Kriegsmarine code in November 1932. The Polish-made replicas of the apparatus (the Enigma-"doubles to the French and the British during a tripartite conference in Warsaw as early as in July in 1939. Before Second World War. (WW2).
Marian Rejewski developed plans for a machine that could, through brute force, work through the more than 17,000 possible positions. The machine was called a "Bomba".
AVA Radio Manufacturing Company (Wytwornia Radiotechniczna AVA) in Warsaw in Poland, the same company that built the Polish copies of the Enigma, also built the first Bomby (the plural of Bomba) for the Polish cipher bureau. It resembled three pairs of Enigma duplicates linked together. The new Bomby and Zygalskis sheets worked well, finding solutions in two hours or less through 1938.
After Brits change name from the Polish "Bomba" to the French spelling, "Bombe".
During mid-July 1939, Chief-of-Staff Lt.-Gen. Waclaw Stachiewicz, authorized the Ciphers Office to share all their knowledge on Enigma with the Allied intelligence services. The Allied representatives in France and England received Polish-made clones of the Enigma encryption machine during the a meeting in Warsaw between 24 and 26 July, 1939.
The French and British representatives were astonished to see not only Enigma replicas, but also a machine that could break the Enigma settings and code.
On 16 August 1939, General Stewart Menzies was given a copy of an Enigma at the Victoria Station in London.
The British began to read Enigma messages in mid-August, 1939.
By the end of December 1932 Reichswehr Enigma code was partly broken by Marian Rejewski
Fully decrypted Enigma texts were read by BS4 since mid January 1933.
During Roehm's Putsch in June 1934 Enigma messages were read within minutes from their interception.
During two weeks long cryptographic exercises organised at BS4 in January 1938 up to 75 percent of secret German communication was decrypted within hours from interception.
Wehrmacht correspondence was decrypted as efficiently up to November 1938 and Sicherheitsdienst up to 1st July 1939. Once Chi-Dienst upgraded German Enigmas BS4 lost its possibilities and between November 1938 and Summer 1939 only one in ten Wehrmacht despatch was read.
In July 1939 BS4 shared its secrets with GC&CS and cypher section of the French SR.
In October 1939 evacuated from Poland BS4 codebreakers resumed their work in France as Equipe Z
On 17th January 1940 Equipe Z as the first Allied codebreaking team broke wartime Enigma daily key and immediately passed its findings to Bletchley Park. Bletchley Park began its mass codebreaking work.
Equipe Z was active until November 1942 when Wehrmacht occupied Vichy and German RDF vehicles were spotted near its premise.
In total Poles decrypted Enigma cypher for ten years from December 1932 until November 1942.
Poland is victim of war ww2 Rejewski enigma code breakers gen.Sosabowski Skalski Skarbek Leski D-Day Battle of Britain Polish squadrons numbered 302 and 303 Intelligence AK V2 1939 September Narvik Tobruk Monte Cassino Warsaw Uprising 1944 for freedom and peace in the world Irena Sendlerowa Żegota Sławik Army Home Resistance
Polish team of mathematicians who first had success against the Enigma machine.CIA