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  2. Japanese cryptology from the 1500s to Meiji - Wikipedia

    en.wikipedia.org/wiki/Japanese_cryptology_from...

    Japanese authors have identified two events that influenced the Japanese army's decision to invite a foreigner to improve their cryptology. The first was an incident during the Siberian Intervention. The Japanese army came into possession of some Soviet diplomatic correspondence, but their cryptanalysts were unable decipher the messages.

  3. Japanese naval codes - Wikipedia

    en.wikipedia.org/wiki/Japanese_naval_codes

    A cipher machine developed for Japanese naval attaché ciphers, similar to JADE. It was not used extensively, [5] [6] but Vice Admiral Katsuo Abe, a Japanese representative to the Axis Tripartite Military Commission, passed considerable information about German deployments in CORAL, intelligence "essential for Allied military decision making in the European Theater."

  4. Type B Cipher Machine - Wikipedia

    en.wikipedia.org/wiki/Type_B_Cipher_Machine

    Analog of the Japanese Type B Cipher Machine (codenamed Purple) built by the U.S. Army Signal Intelligence Service Purple analog equipment in use. The "System 97 Typewriter for European Characters" (九七式欧文印字機 kyūnana-shiki ōbun injiki) or "Type B Cipher Machine", codenamed Purple by the United States, was an encryption machine used by the Japanese Foreign Office from February ...

  5. Japanese army and diplomatic codes - Wikipedia

    en.wikipedia.org/wiki/Japanese_army_and...

    Ships signalled their noontime position, course, speed and other movement items. As the Japanese relied extensively on sea transport for isolated garrisons, the information assisted in planning air raids and action against Japanese air raids, and, through the American Seventh Fleet, submarine attacks. Breaking it in 1943 gave the Allies insight ...

  6. Magic (cryptography) - Wikipedia

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

    In 1923, a US Navy officer acquired a stolen copy of the Secret Operating Code codebook used by the Imperial Japanese Navy during World War I.Photographs of the codebook were given to the cryptanalysts at the Research Desk and the processed code was kept in red-colored folders (to indicate its Top Secret classification).

  7. Cryptography in Japan - Wikipedia

    en.wikipedia.org/?title=Cryptography_in_Japan&...

    From Wikipedia, the free encyclopedia. Redirect page. Redirect to: Japanese cryptology from the 1500s to Meiji

  8. National Cryptologic Museum - Wikipedia

    en.wikipedia.org/wiki/National_Cryptologic_Museum

    The NCM includes an unclassified library of books, papers, and other materials relating to the history of cryptography and cryptology as well. [9] The library is open on days when the museum is open. The library is non-circulating (that is, material cannot be borrowed or checked out by the public), but photocopying and photography are allowed.

  9. Visual cryptography - Wikipedia

    en.wikipedia.org/wiki/Visual_cryptography

    Visual cryptography is a cryptographic technique which allows visual information (pictures, text, etc.) to be encrypted in such a way that the decrypted information appears as a visual image. One of the best-known techniques has been credited to Moni Naor and Adi Shamir , who developed it in 1994. [ 1 ]