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On entering World War II in June 1940, the Italians were using book codes for most of their military messages. The exception was the Italian Navy , which after the Battle of Cape Matapan started using the C-38 version of the Boris Hagelin rotor-based cipher machine , particularly to route their navy and merchant marine convoys to the conflict ...
Cryptography was used extensively during World War II because of the importance of radio communication and the ease of radio interception. The nations involved fielded a plethora of code and cipher systems, many of the latter using rotor machines. As a result, the theoretical and practical aspects of cryptanalysis, or codebreaking, were much ...
Dilly Knox, leading cryptologist, cracked the code of the commercial Enigma machines used in the Spanish Civil War, one of the British participants in the conference in which the Poles disclosed to their French and British allies their achievements in Enigma decryption, broke the Abwehr non-steckered Enigma
British codebreakers, including Alan Turning, were based at the site during the war and fed crucial information to Allied forces ahead of D-Day.
Mavis Lilian Batey, MBE (née Lever; 5 May 1921 – 12 November 2013), was a British code-breaker during World War II. She was one of the leading female codebreakers at Bletchley Park. [1] She later became a historian of gardening, who campaigned to save historic parks and gardens, and an author. [2]
U.S. Army Signals Intelligence Service cryptologists, mostly women, at work at Arlington Hall circa 1943. The Code Girls or World War II Code Girls is a nickname for the more than 10,000 women who served as cryptographers (code makers) and cryptanalysts (code breakers) for the United States Military during World War II, working in secrecy to break German and Japanese codes.
Patricia Davies (née Owtram; born 19 June 1923) is an English former codebreaker who served as a special duties linguist in the Women’s Royal Naval Service during World War II. She and her younger sister Jean Argles are often referred to as "The Codebreaking Sisters". [1]
William Thomas Tutte OC FRS FRSC (/ t ĘŚ t /; 14 May 1917 – 2 May 2002) was an English and Canadian code breaker and mathematician. During the Second World War, he made a brilliant and fundamental advance in cryptanalysis of the Lorenz cipher, a major Nazi German cipher system which was used for top-secret communications within the Wehrmacht High Command.