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  2. Pigpen cipher - Wikipedia

    en.wikipedia.org/wiki/Pigpen_cipher

    The pigpen cipher uses graphical symbols assigned according to a key similar to the above diagram. [1]The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [2] [3] is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid.

  3. Tap code - Wikipedia

    en.wikipedia.org/wiki/Tap_code

    Like the "knock code", a Cyrillic script version is said to have been used by nihilist prisoners of the Russian czars. [5] The knock code is featured in Arthur Koestler's 1941 work Darkness at Noon. [6] Kurt Vonnegut's 1952 novel Player Piano also includes a conversation between prisoners using a form of tap code. The code used in the novel is ...

  4. Beale ciphers - Wikipedia

    en.wikipedia.org/wiki/Beale_ciphers

    A pamphlet published in 1885, entitled The Beale Papers, is the source of this story.The treasure was said to have been obtained by an American named Thomas J. Beale in the early 1800s, from a mine to the north of Nuevo México (New Mexico), at that time in the Spanish province of Santa Fe de Nuevo México (an area that today would most likely be part of Colorado).

  5. Kryptos - Wikipedia

    en.wikipedia.org/wiki/Kryptos

    The dust jacket of the US version of Dan Brown's 2003 novel The Da Vinci Code contains two references to Kryptos—one on the back cover (coordinates printed light red on dark red, vertically next to the blurbs) is a reference to the coordinates mentioned in the plaintext of passage 2, except the degree digit is off by one. When Brown and his ...

  6. Book cipher - Wikipedia

    en.wikipedia.org/wiki/Book_cipher

    However this means, as well as being attacked by all the usual means employed against other codes or ciphers, partial solutions may help the cryptanalyst to guess other codewords, or even to break the code completely by identifying the key text. This is, however, not the only way a book cipher may be broken.

  7. Bacon's cipher - Wikipedia

    en.wikipedia.org/wiki/Bacon's_cipher

    Image of Bacon's cipher. Bacon's cipher or the Baconian cipher is a method of steganographic message encoding devised by Francis Bacon in 1605. [1] [2] [3] In steganograhy, a message is concealed in the presentation of text, rather than its content.

  8. Enigma machine - Wikipedia

    en.wikipedia.org/wiki/Enigma_machine

    The Swiss used a version of Enigma called Model K or Swiss K for military and diplomatic use, which was very similar to commercial Enigma D. The machine's code was cracked by Poland, France, the United Kingdom and the United States; the latter code-named it INDIGO. An Enigma T model, code-named Tirpitz, was used by Japan.

  9. Enochian - Wikipedia

    en.wikipedia.org/wiki/Enochian

    Enochian (/ ɪ ˈ n oʊ k i ə n / ə-NOH-kee-ən) is an occult constructed language [3] — said by its originators to have been received from angels — recorded in the private journals of John Dee and his colleague Edward Kelley in late 16th-century England. [4]