01 n. The art of writing in cipher, or in characters which are not intelligible except to persons who have the key; cryptography.
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1.
The art of writing in cipher, or in characters which are not intelligible except to persons who have the key; cryptography.
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2.
The branch of cryptography in which messages are hidden inside other messages; -- used commonly for the process of hiding messages inside a computerized image file, as for example hiding the name and copyright notice of the owner of an image as protection against violation of the copyright.