the science or study of the techniques of secret writing, especially code and cipher systems, methods, and the like.Compare cryptanalysis(def 2).
the procedures, processes, methods, etc., of making and using secret writing, as codes or ciphers.
anything written in a secret code, cipher, or the like.
Origin of cryptography
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the science or study of analysing and deciphering codes, ciphers, etc; cryptanalysis
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Online Etymology Dictionary, © 2010 Douglas Harper
The science of coding and decoding messages so as to keep these messages secure. Coding (see encryption) takes place using a key that ideally is known only by the sender and intended recipient of the message.
The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.