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cipher: see cryptography cryptography (krĭptŏg`rəfē) [Gr.,=hidden writing], science of secret writing. ..... Click the link for more information. . cipher(1) The core algorithm used to encrypt data. A cipher transforms regular data (plaintext) into a coded set of data (ciphertext) that is not reversible without a key. For example, AES and DES are examples of secret key block ciphers. The complete encryption algorithm is the cipher plus the technique used to apply the cipher to the message, which can be a very intricate series of steps. See cryptography, encryption algorithm, block cipher and plaintext. cipher, cypher 1. an obsolete name for zero 2. any of the Arabic numerals (0, 1, 2, 3, etc., to 9) or the Arabic system of numbering as a whole 3. Music a defect in an organ resulting in the continuous sounding of a pipe, the key of which has not been depressed |
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