steganography
<security> 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].
(1998-07-13)
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