-
machine made
1915, two Dutch Naval officers invented a machine to encrypt messages. This became known as the Enigma machine. -
machine patented
1918, Arthur Scherbius, a German businessman, patented the Enigma machine. -
polish world leading crypt analysis
The Poles set up a world leading crypt analysis bureau and hired leading mathematicians such as Marian Rejewski. -
own model- Marian Rejewski
Marian Rejewski built his own model of the Enigma machine without having actually seen it. -
german traiter
In 1931, a German traitor told Rejewski that the Germans routinely changed the daily key indicator setting for the codes. -
6 replicas of enigma machine
To find the daily key, Rejewski build 6 replicas of the Enigma machine and connected them. -
new enigma machine 'the bomb'
The new machine could run through more than 17,000 indicator settings. He called this machine, ‘the bomb’. -
the bome was secretly used
The bomb was used to secretly read the traffic from the German Enigma machines for several years. -
2 new rotors german enigma machine
In 1938 Germans added two new roters into the Enigma machine. This made it harder for the Poles to read the traffic
