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Steganography is hiding information inside of other information. The classic example
of steganography is hiding a message inside an image file. By modifying every nth
pixel, a hidden message can be embedded in the text. The change to the image by
modifying the pixels is not a large enough change to be detected by viewing the
image.
In cryptography, we know there is a hidden message but we are unable to read it.
In steganogrophy, we do not even know there is a hidden message.
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