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Joan Elisabeth Lowther Murray, MBE (née Clarke; 24 June 1917 – 4 September 1996) was an English cryptanalyst and numismatist who worked as a code-breaker at Bletchley Park during the Second World War.
Joan Elisabeth Lowther Murray (née Clarke) was a cryptanalyst and numismatist. Though she did not personally seek the spotlight, her important role in the Enigma project that decrypted Nazi Germany's secret communications earned her awards and citations, such as appointment as a Member of the Order of the British Empire (MBE), in 1946. [49] [50]
Hut 8 was a section in the Government Code and Cypher School (GC&CS) at Bletchley Park (the British World War II codebreaking station, located in Buckinghamshire) tasked with solving German naval (Kriegsmarine) Enigma messages.
Joan Clarke was one of the few women employed at Bletchley as a full-fledged cryptanalyst. ... Naval Enigma deciphering was in Hut 8, with translation in Hut 4.
Stephen Michael Alvin Banister, Codebreaker in Hut 6 and inventor of the 'BLISTS' or 'Banister Lists' - a register of Enigma messages showing special indicators to facilitate detection of certain items and identify crib messages. (Under Secretary at the Dept of the Environment) Rachel Joan Banister (née Rawlence), Codebreaker Hut 6
On 9 May 1941, when a version of the K Book was recovered from U-boat U-110, Joan Clarke, and her compatriots at Hut 8, the section at Bletchley Park tasked with solving German naval (Kriegsmarine) Enigma messages, noticed that German telegraphists were not acting in a random way, which they were supposed to when making up the message Indicator ...
Joan Clarke (eventually deputy head of Hut 8) was one of the few women employed at Bletchley as a full-fledged cryptanalyst. [ 28 ] [ 29 ] Properly used, the German Enigma and Lorenz ciphers should have been virtually unbreakable, but flaws in German cryptographic procedures, and poor discipline among the personnel carrying them out, created ...
The Germans were coding their messages using Enigma machine, which the Germans believed was unbreakable. Turing speaks about proposing to Joan Clarke and how he broke the news that he had homosexual tendencies. But midway through he realized he could not continue with the relationship and called off the engagement.