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  2. Book cipher - Wikipedia

    en.wikipedia.org/wiki/Book_cipher

    Book cipher. The King James Bible, a highly available publication suitable for the book cipher. A book cipher is a cipher in which each word or letter in the plaintext of a message is replaced by some code that locates it in another text, the key . A simple version of such a cipher would use a specific book as the key, and would replace each ...

  3. List of children's classic books - Wikipedia

    en.wikipedia.org/wiki/List_of_children's_classic...

    This is a list of classic children's books published no later than 2008 and still available in the English language. [1] [2] [3] Books specifically for children existed by the 17th century. Before that, books were written mainly for adults – although some later became popular with children.

  4. Beale ciphers - Wikipedia

    en.wikipedia.org/wiki/Beale_ciphers

    Beale ciphers. The Beale ciphers are a set of three ciphertexts, one of which allegedly states the location of a buried treasure of gold, silver and jewels estimated to be worth over 43 million US dollars as of January 2018. Comprising three ciphertexts, the first (unsolved) text describes the location, the second (solved) ciphertext accounts ...

  5. The Eleventh Hour (book) - Wikipedia

    en.wikipedia.org/wiki/The_Eleventh_Hour_(book)

    The Eleventh Hour: A Curious Mystery is an illustrated children's book by Graeme Base. In it, Horace the Elephant holds a party for his eleventh birthday, to which he invites his ten best friends (various animals) to play eleven games and share in a feast that he has prepared. However, at the time they are to eat—11:00—they are startled to ...

  6. Pigpen cipher - Wikipedia

    en.wikipedia.org/wiki/Pigpen_cipher

    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. The example key shows one way the letters can be assigned to the grid.

  7. Running key cipher - Wikipedia

    en.wikipedia.org/wiki/Running_key_cipher

    Running key cipher. In classical cryptography, the running key cipher is a type of polyalphabetic substitution cipher in which a text, typically from a book, is used to provide a very long keystream. The earliest description of such a cipher was given in 1892 by French mathematician Arthur Joseph Hermann (better known for founding Éditions ...

  8. Jefferson disk - Wikipedia

    en.wikipedia.org/wiki/Jefferson_disk

    A disk cipher device of the Jefferson type from the 2nd quarter of the 19th century in the National Cryptologic Museum. The Jefferson disk, also called the Bazeries cylinder or wheel cypher, was a cipher system commonly attributed to Thomas Jefferson that uses a set of wheels or disks, each with letters of the alphabet arranged around their edge in an order, which is different for each disk ...

  9. Alice and Bob - Wikipedia

    en.wikipedia.org/wiki/Alice_and_Bob

    Alice and Bob are fictional characters commonly used as placeholders in discussions about cryptographic systems and protocols, [ 1] and in other science and engineering literature where there are several participants in a thought experiment. The Alice and Bob characters were invented by Ron Rivest, Adi Shamir, and Leonard Adleman in their 1978 ...

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