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THE CODE WAR

Mme Lerouge

Created on August 27, 2023

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Transcript

The code war

How did the Allies succeed in cracking the Enigma machine?

Start

The intelligence factory

Go back in time! Look up the various ressources to learn about the work of the people who helped defeat the Axis. Don't forget to fill in the worksheet as you go.

The minds behind the Ultra project

Find out who initiated and coordinated the war effort in the field of cryptanalysis

The political leader

The head ofthe GC&CS

The Chief of MI6

The center of operations

Bletchley Park housed the British codebreaking operation during World War II and is considered as the birthplace of modern computing.

Discover

Behind the code

How was the Enigma machine cracked?

The Bombe machine

Origins

Appearance

How does it work?

A war hero ...

Marian Rejewski's work was instrumental in helping the Allies decrypt the Enigma messages. However, only one person is remembered nowadays...

Alan Turing

... but not the only one

A well-kept secret...

The formidable work that was going on at Bletchley Park remained secret. The employees — who had signed a document forbidding them from discussing their activities — never broke the silence it dictated. It was only in 1971, when the Official Secrets Act was revoked, that they were finally able tell each other and their family what their work had been there.

... that helped win the war

Experts have suggested that the Bletchley Park codebreakers may have shortened the war by as much as two years.

Bletchley Park, Milton Keynes

Once a country home, the mansion was acquired by the British government in 1938. It was then refitted to welcome the GC&CS in order to decode messages produced by the infamous Enigma machine. By late 1944, Bletchley Park had a staff of nearly 9,000 people, hired among experts at crossword-puzzle solving and chess, mathematicians and scientists. About three-fourths of the workers were women.