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invented
two Dutch Naval officers invented a machine to encrypt messages. This became known as the Enigma machine. -
patented the Enigma machine.
Arthur Scherbius, a German businessman, patented the Enigma machine. -
production of Enigma machine
mass production of Enigma machine with 30,000 machines being sold to the German military over the next 2 decades. -
set up a world leading crypt analysis bureau
The Poles set up a world leading crypt analysis bureau and hired leading mathematicians such as Marian Rejewski. -
built his own model of the Enigma machine
Marian Rejewski built his own model of the Enigma machine without having actually seen it. -
changed the setting of the codes
a German traitor told Rejewski that the Germans routinely changed the daily key indicator setting for the codes. -
build 6 replicas of the Enigma machine
To find the daily key, Rejewski build 6 replicas of the Enigma machine and connected them. -
The bomb
The bomb was used to secretly read the traffic from the German Enigma machines for several years. -
The new machine
The new machine could run through more than 17,000 indicator settings. He called this machine, ‘the bomb’. -
Germans added two new roters into the Enigma machine.
Germans added two new roters into the Enigma machine. This made it harder for the Poles to read the traffic -
codebreaking
The Poles asked their allies, Britian and France to help them with the analysis and codebreaking of the German messages. -
The British smuggle out the Enigma replica machines
The British smuggle out the Enigma replica machines two weeks before Germany invaded Poland -
The smuggled Enigma replicas
The smuggled Enigma replicas were taken to the British code . and cypher school at Bletchley Park. -
‘bombs’ for testing the German codes.
Alan Turing, a British mathematician at Bletchley Park thought of a different way of using the ‘bombs’ for testing the German codes. -
Turing used 180 ‘bombs’
Turing used 180 ‘bombs’ which clicked round letter-by-letter, 20 every second, until they hit the correct one. -
Hundreds of code breakers
Hundreds of code breakers at Blechley Park worked round the clock to decipher the German Enigma communications they intercepted -
Colossus
In 1943, British engineer, Tommy Flowers, created Colossus -
first modern day computer
Colossus changed the way code breaking was done from electro-mechanical to electronic – it was the first modern day computer -
5,000 characters
Colossus could read paper tape at 5,000 characters a second. -
The Allied work
The Allied work on codebreaking played a key role in victories such as D-Day. It shortened the length of WW2.
