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 (http://theory.lcs.mit.edu/~rivest/chaffing.txt)].
