cipher alphabet

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• cipher alphabet — cipher alphabet, the conventional letters, numerals, and other signs of a written language, together with the characters or symbols which replace the conventional symbols in any cryptographic system …   Useful english dictionary

• Cipher disk — The Union Cipher Disk from the American Civil War was 3.75 inches (95 mm) in diameter and made of light yellow heavy card stock. It consisted of two concentric disks of unequal size revolving on a central pivot. The disks were divided along their …   Wikipedia

• Cipher — Ci pher, n. [OF. cifre zero, F. Chiffre figure (cf. Sp.cifra, LL. cifra), fr. Ar. [,c]ifrun, [,c]afrun, empty, cipher, zero, fr. [,c]afira to be empty. Cf. {Zero}.] [1913 Webster] 1. (Arith.) A character [0] which, standing by itself, expresses… …   The Collaborative International Dictionary of English

• Cipher key — Cipher Ci pher, n. [OF. cifre zero, F. Chiffre figure (cf. Sp.cifra, LL. cifra), fr. Ar. [,c]ifrun, [,c]afrun, empty, cipher, zero, fr. [,c]afira to be empty. Cf. {Zero}.] [1913 Webster] 1. (Arith.) A character [0] which, standing by itself,… …   The Collaborative International Dictionary of English

• Cipher runes — The Rök Runestone features tent runes in its uppermost row. Centered in the bottom row is a hook rune. Cipher runes, or cryptic runes, are the cryptographical replacement of the letters of the runic alphabet. Contents …   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

• cipher — cipherable, adj. cipherer, n. /suy feuhr/, n. 1. zero. 2. any of the Arabic numerals or figures. 3. Arabic numerical notation collectively. 4. something of no value or importance. 5. a person of no influence; nonentity. 6. a secret method of… …   Universalium

• cipher component — noun or cipher sequence : the sequence of a substitution alphabet that identifies the ciphertext letters compare alphabet 1j …   Useful english dictionary

• 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

• cipher — I. n. 1. Zero, naught or nought, nothing. 2. Character, symbol, device, monogram. 3. Secret character, private alphabet. 4. Person of no account, nobody, person without influence. II. v. n. Practise arithmetic, use figures …   New dictionary of synonyms

• 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