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Digital Watermarks
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On 2-Apr-2007, at 15:41, TidBITS Editors wrote:
> Digital watermarking subtly modifies the media data to overlay
> encrypted or in-the-clear information that can be retrieved. The
> idea is that the watermark can't be removed without also affecting
> the overall quality of the music encoded in the file. One attempt
> by the record industry at watermarking was definitively defeated by
> Princeton professor Ed Felten, a notable critic of DRM and other
> schemes.
As far as I know, every digital watermark system can be circumvented
if you have two copies of the file in question with differing
watermarks.
Or am I behind the curve again?
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