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The Enigma machine is a cipher device developed and used in the early- to mid-20th century to protect ... and decoded the second trigram, UHL, to obtain the SXT ...
Cryptanalysis of the Enigma ciphering system enabled the western Allies in World War II to read substantial amounts of Morse-coded radio communications of the Axis ...
Hans-Thilo Schmidt (13 May 1888 – 19 September 1943) codenamed Asché or Source D, was a German spy who sold secrets about the Enigma machine to the French during World War II.
The Enigma is an electro-mechanical rotor machine used for the ... one could imagine using 100 code clerks who each tried to decode a message using 1000 distinct ...
Naval Enigma decrypted in Hut 8 was forwarded from Hut 4 to the Admiralty's Operational Intelligence Centre (OIC), [31] which distributed it initially under the codeword "HYDRO". [30] The codeword "ULTRA" was adopted in June 1941. [32] This codeword was reportedly suggested by Commander Geoffrey Colpoys, RN, who served in the Royal Navy's OIC.
Decryption of the Enigma Cipher allowed the Allies to read important parts of German radio traffic on important networks and was an invaluable source of military intelligence throughout the war. Intelligence from this source and other high level sources, such as Cryptanalysis of the Lorenz cipher , was eventually called Ultra .
It has sometimes been erroneously stated that Turing designed Colossus to aid the cryptanalysis of the Enigma. [4] (Turing's machine that helped decode Enigma was the electromechanical Bombe, not Colossus.) [5] The prototype, Colossus Mark 1, was shown to be working in December 1943 and was in use at Bletchley Park by early 1944. [1]
By her hard work, Rock was ranked one of the better workers on the Enigma machine project, and was promoted to seniority and a higher salary. On 8 December 1941, an Abwehr Enigma message was decoded and read by the team in Bletchley Park by the use of a manual technique called "rodding" that was identified by Knox. [11]