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[Gr.,=hidden writing], science of secret writing. There are many devices by which a message can be concealed from the casual reader, e.g., invisible writing, but the term cryptography strictly applies to translating messages into cipher or code.
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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
A transposition or substitution code for transmitting secret messages.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
cipherPronounced "sy-fer," a cipher is an algorithm that encrypts data. However, the term may also refer to the encrypted data as well. See encryption algorithm, ciphertext and cipherpunk.
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