[Cryptography] Facebook -> SteganographyBook
grarpamp at gmail.com
Tue Jan 27 18:33:41 EST 2015
On Tue, Jan 27, 2015 at 6:05 PM, Tom Mitchell <mitch at niftyegg.com> wrote:
> Facebook fiddles with images to optimize their storage and display.
> They hide or scrub EXIF information as well. This must be
> a very clever trick to pack a payload into an image on FB.
Good point. Many services do this. So classical steg of
invisibly embedding binary in image wouldn't work there. In
that case examine how much visible resolution is preserved
and available to you after such fiddling and overlay your data
within that, ie a QR code transparency mask.
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