[Digikam-devel] [Bug 268981] WISH: Digital Right Management with integrated steganographic capabilities (write and read).

[Andreas K. Huettel]

https://bugs.kde.org/show_bug.cgi?id=268981


Andreas K. Huettel <dilfridge at gentoo.org> changed:

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                 CC|                            |dilfridge at gentoo.org




--- Comment #4 from Andreas K. Huettel <dilfridge gentoo org>  2011-03-25 20:27:54 ---
There's probably some confusion here. 

Since digikam mainly works with open and well-documented image formats which do
not support this, restricting what a user can do with an image cannot be done
and any attempts in that direction (aka. the pdf drm limitations) will just not
work. 

My interpretation of Axel's request (as digikam user who has been thinking
about this before) is having a module that generates and recognizes watermarks,
in particular invisible and robust ones (robust meaning that they survive image
resizing, cropping, recompression, ...). This of course does not limit what can
be done with a picture in a technical sense, but it can be used to prove
provenance, ownership, or copyright claims.

Unfortunately, to my knowledge there is no open source project covering such a
topic. Which may also be the case because of patented algorithms...

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