substitution cipher

substitution cipher
a method of encryption by which units of plaintext are substituted with ciphertext according to a regular system; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth. The receiver deciphers the text by performing an inverse substitution.

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  • Substitution cipher — In cryptography, a substitution cipher is a method of encryption by which units of plaintext are replaced with ciphertext according to a regular system; the units may be single letters (the most common), pairs of letters, triplets of letters,… …   Wikipedia

  • substitution cipher — noun Date: 1936 a cipher in which the letters of the plaintext are systematically replaced by substitute letters compare transposition cipher …   New Collegiate Dictionary

  • substitution cipher — Cryptography. a cipher that replaces letters of the plain text with another set of letters or symbols. Cf. transposition cipher. [1935 40] * * * …   Universalium

  • substitution cipher — Cryptography. a cipher that replaces letters of the plain text with another set of letters or symbols. Cf. transposition cipher. [1935 40] …   Useful english dictionary

  • Substitution box — In cryptography, a substitution box (or S box) is a basic component of symmetric key algorithms. In block ciphers, they are typically used to obscure the relationship between the plaintext and the ciphertext mdash; Shannon s property of confusion …   Wikipedia

  • Substitution — For Wikipedia Template Substitution, see Substitution is the replacement of one thing with another. In mathematics: * Substitution rule, in calculus * Variable substitution, in first order logic * The substitution method of solving simultaneous… …   Wikipedia

  • cipher disk — noun or cipher wheel : a device for enciphering and deciphering in substitution cipher consisting of two movable concentric disks with the letters of the alphabet written around the margin of each …   Useful english dictionary

  • substitution code — noun A substitution cipher …   Wiktionary

  • Cipher (disambiguation) — Cipher can refer to: An algorithm for performing encryption, including: substitution ciphers permutation ciphers An English name for the number 0 Cipher, an evil Pokémon syndicate, Cipher (marvel), a Marvel Comics X Men character. Cipher… …   Wikipedia

  • Cipher — For other uses, see Cipher (disambiguation). Edward Larsson s rune cipher resembling that found on the Kensington Runestone. Also includes runically unrelated blackletter writing style and pigpen cipher. In cryptography, a cipher (or cypher) is… …   Wikipedia

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