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  2. Caesar cipher - Wikipedia

    en.wikipedia.org/wiki/Caesar_cipher

    The Vigenère cipher uses a Caesar cipher with a different shift at each position in the text; the value of the shift is defined using a repeating keyword. [14] If the keyword is as long as the message, is chosen at random, never becomes known to anyone else, and is never reused, this is the one-time pad cipher, proven unbreakable. However the ...

  3. ROT13 - Wikipedia

    en.wikipedia.org/wiki/ROT13

    ROT13 is a special case of the Caesar cipher which was developed in ancient Rome, used by Julius Caesar in the 1st century BC. [1] An early entry on the Timeline of cryptography . ROT13 can be referred by "Rotate13", "rotate by 13 places", hyphenated "ROT-13" or sometimes by its autonym "EBG13".

  4. Secret decoder ring - Wikipedia

    en.wikipedia.org/wiki/Secret_decoder_ring

    Secret decoders are generally circular scales, descendants of the cipher disk developed in the 15th century by Leon Battista Alberti.Rather than the complex polyalphabetic Alberti cipher method, the decoders for children invariably use simple Caesar cipher substitutions.

  5. File:Caesar cipher left shift of 3.svg - Wikipedia

    en.wikipedia.org/wiki/File:Caesar_cipher_left...

    This work has been released into the public domain by its author, a guy.This applies worldwide. In some countries this may not be legally possible; if so: a guy grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

  6. Cipher - Wikipedia

    en.wikipedia.org/wiki/Cipher

    Visual representation of how Caesar's Cipher works. The Caesar Cipher is one of the earliest known cryptographic systems. Julius Caesar used a cipher that shifts the letters in the alphabet in place by three and wrapping the remaining letters to the front to write to Marcus Tullius Cicero in approximately 50 BC. [citation needed]

  7. File:Caesar3.svg - Wikipedia

    en.wikipedia.org/wiki/File:Caesar3.svg

    The following other wikis use this file: Usage on anp.wikipedia.org गणित; Usage on ar.wikipedia.org رياضيات; نظرية الزمر

  8. Pinwheel (cryptography) - Wikipedia

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

    The German Lorenz SZ 42 cipher machine contained 12 pinwheels, with a total of 501 pins. In cryptography, a pinwheel was a device for producing a short pseudorandom sequence of bits (determined by the machine's initial settings), as a component in a cipher machine. A pinwheel consisted of a rotating wheel with a certain number of positions on ...

  9. Encryption - Wikipedia

    en.wikipedia.org/wiki/Encryption

    A message encoded with this type of encryption could be decoded with a fixed number on the Caesar cipher. [4] Around 800 AD, Arab mathematician Al-Kindi developed the technique of frequency analysis – which was an attempt to crack ciphers systematically, including the Caesar cipher. [3]