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  2. Caesar cipher - Wikipedia

    en.wikipedia.org/wiki/Caesar_cipher

    Caesar cipher. The action of a Caesar cipher is to replace each plaintext letter with a different one a fixed number of places down the alphabet. The cipher illustrated here uses a left shift of 3, so that (for example) each occurrence of E in the plaintext becomes B in the ciphertext. In cryptography, a Caesar cipher, also known as Caesar's ...

  3. Coding theory - Wikipedia

    en.wikipedia.org/wiki/Coding_theory

    The term algebraic coding theory denotes the sub-field of coding theory where the properties of codes are expressed in algebraic terms and then further researched. [citation needed] Algebraic coding theory is basically divided into two major types of codes: [citation needed] Linear block codes; Convolutional codes

  4. Codecademy - Wikipedia

    en.wikipedia.org/wiki/Codecademy

    Code Year was a free incentive Codecademy program intended to help people follow through on a New Year's Resolution to learn how to program, by introducing a new course for every week in 2012. [32] Over 450,000 people took courses in 2012, [33] [34] and Codecademy continued the program into 2013. Even though the course is still available, the ...

  5. Atbash - Wikipedia

    en.wikipedia.org/wiki/Atbash

    Encryption. The Atbash cipher is a particular type of monoalphabetic cipher formed by taking the alphabet (or abjad, syllabary, etc.) and mapping it to its reverse, so that the first letter becomes the last letter, the second letter becomes the second to last letter, and so on. For example, the Latin alphabet would work like this: Plain. A. B. C.

  6. Computer programming - Wikipedia

    en.wikipedia.org/wiki/Computer_programming

    Computer programming or coding is the composition of sequences of instructions, called programs, that computers can follow to perform tasks. [1] [2] It involves designing and implementing algorithms, step-by-step specifications of procedures, by writing code in one or more programming languages.

  7. Transposition cipher - Wikipedia

    en.wikipedia.org/wiki/Transposition_cipher

    Step-by-step process for the double columnar transposition cipher. In cryptography, a transposition cipher (also known as a permutation cipher) is a method of encryption which scrambles the positions of characters ( transposition) without changing the characters themselves. Transposition ciphers reorder units of plaintext (typically characters ...

  8. Coding best practices - Wikipedia

    en.wikipedia.org/wiki/Coding_best_practices

    Coding best practices. Coding best practices or programming best practices are a set of informal, sometimes personal, rules ( best practices) that many software developers, in computer programming follow to improve software quality. [ 1] Many computer programs require being robust and reliable for long periods of time, [ 2] so any rules need to ...

  9. Bulls and cows - Wikipedia

    en.wikipedia.org/wiki/Bulls_and_Cows

    This software uses "A" to denote "bulls" (digit in the correct position) and "B" to denote "cows" (digit in the wrong position). Bulls and cows (also known as cows and bulls or pigs and bulls) is a code -breaking mind or paper and pencil game for two or more players. The game is played in turns by two opponents who aim to decipher the other's ...

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