|n.||1.||The art of writing in cipher, or in characters which are not intelligible except to persons who have the key; cryptography.|
|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.|
|(security)||steganography - Hiding a secret message within a larger one in such
a way that others can not discern the presence or contents of
the hidden message. For example, a message might be hidden
within an image by changing the least significant bits to
be the message bits.|
[Chaffing and Winnowing: Confidentiality without Encryption, Ronald L. Rivest, MIT Lab for Computer Science, 1998-03-22].