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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. Epic! - Wikipedia

    en.wikipedia.org/wiki/Epic!

    Epic! Epic! is an American kids subscription-based reading and learning platform. It offers access to books and videos for children ages 12 and under. [1] The service can be used on desktop and mobile devices. [2] Epic! was founded in 2013 by Suren Markosian and Kevin Donahue [3] and launched in 2014. [4]

  4. List of Cyberchase episodes - Wikipedia

    en.wikipedia.org/wiki/List_of_Cyberchase_episodes

    episodes. Cyberchase is an animated mathematics series that currently airs on PBS Kids. The show revolves around three Earth children (Jackie, Matt, and Inez) who use mathematics and problem-solving skills to save Cyberspace from a villain known as The Hacker. The three are transported into Cyberspace by Motherboard, the ruler of this virtual ...

  5. Cryptography - Wikipedia

    en.wikipedia.org/wiki/Cryptography

    Cryptography. Cryptography, or cryptology (from Ancient Greek: κρυπτός, romanized : kryptós "hidden, secret"; and γράφειν graphein, "to write", or -λογία -logia, "study", respectively [1] ), is the practice and study of techniques for secure communication in the presence of adversarial behavior. [2]

  6. Interactive children's book - Wikipedia

    en.wikipedia.org/wiki/Interactive_children's_book

    Interactive children's book. Interactive children's books are a subset of children's books that require participation and interaction by the reader. Participation can range from books with texture to those with special devices used to help teach children certain tools. Interactive children's books may also incorporate modern technology or be ...

  7. 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.

  8. Vigenère cipher - Wikipedia

    en.wikipedia.org/wiki/Vigenère_cipher

    The Vigenère cipher is named after Blaise de Vigenère (pictured), although Giovan Battista Bellaso had invented it before Vigenère described his autokey cipher. The Vigenère cipher ( French pronunciation: [viʒnɛːʁ]) is a method of encrypting alphabetic text where each letter of the plaintext is encoded with a different Caesar cipher ...

  9. 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 ...

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