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  2. Enigma machine - Wikipedia

    en.wikipedia.org/wiki/Enigma_machine

    The Enigma machine was invented by German engineer Arthur Scherbius at the end of World War I. [4] The German firm Scherbius & Ritter, co-founded by Scherbius, patented ideas for a cipher machine in 1918 and began marketing the finished product under the brand name Enigma in 1923, initially targeted at commercial markets. [5]

  3. Cryptanalysis of the Enigma - Wikipedia

    en.wikipedia.org/wiki/Cryptanalysis_of_the_Enigma

    The re-use of a permutation in the German Air Force METEO code as the Enigma stecker permutation for the day. [104] Mavis Lever, a member of Dilly Knox's team, recalled an occasion when there was an unusual message, from the Italian Navy, whose exploitation led to the British victory at the Battle of Cape Matapan.

  4. Cipher Department of the High Command of the Wehrmacht

    en.wikipedia.org/wiki/Cipher_Department_of_the...

    From the early 1930s to the start of the war, Germany had a good understanding of, and indeed a lead in, both cryptoanalytic and cryptographic cryptology services. The various agencies had cracked the French–English inter-allied cipher, the Germans with some help from the Italian Communications Intelligence Organization stole American diplomatic codes, and codes taken from the British ...

  5. German Army cryptographic systems of World War II - Wikipedia

    en.wikipedia.org/wiki/German_Army_cryptographic...

    Military Enigma machine, model "Enigma I", used during the late 1930s and during the war; displayed at Museo scienza e tecnologia Milano, Italy. German Army cryptographic systems of World War II were based on the use of three types of cryptographic machines that were used to encrypt communications between units at the division level.

  6. Enigma rotor details - Wikipedia

    en.wikipedia.org/wiki/Enigma_rotor_details

    The German Navy 4-rotor Enigma machine (M4) which was introduced for U-boat traffic on 1 February 1942. The introduction of the fourth rotor was anticipated because captured material dated January 1941 had made reference to the development of a fourth rotor wheel; [ 2 ] indeed, the wiring of the new fourth rotor had already been worked out.

  7. Hans-Thilo Schmidt - Wikipedia

    en.wikipedia.org/wiki/Hans-Thilo_Schmidt

    Władysław Kozaczuk, Enigma: How the German Machine Cipher Was Broken, and How It Was Read by the Allies in World War Two, edited and translated by Christopher Kasparek, Frederick, MD, University Publications of America, 1984. Hugh Sebag-Montefiore, Enigma: the Battle for the Code, London, Weidenfeld & Nicolson, 2000. (Provides information on ...

  8. German code breaking in World War II - Wikipedia

    en.wikipedia.org/wiki/German_code_breaking_in...

    The B-Dienst, created in the early 1930s, had broken the most widely used British naval code by 1935. When war came in 1939, B-Dienst specialists had broken enough British naval codes that the Germans knew the positions of all British warships. They had further success in the early stages of the war as the British were slow to change their codes.

  9. Ultra (cryptography) - Wikipedia

    en.wikipedia.org/wiki/Ultra_(cryptography)

    The more so, since B-Dienst, his own codebreaking group, had partially broken Royal Navy traffic (including its convoy codes early in the war), [84] and supplied enough information to support the idea that the Allies were unable to read Naval Enigma. [d] By 1945, most German Enigma traffic could be decrypted within a day or two, yet the Germans ...