Beware your metadata trail
The British Times Online reports that the EXIF metadata embedded in digital camera images could be used to track down whoever photographed each page of the final Harry Potter novel uploaded it prior to the book's release.
The reality in this case, I think, is that identifying and prosecuting the shooter would be difficult. The camera owner would have had to have registered the camera and have had it serviced, and even with a name authorities would have to demonstrate that the person then used the camera to photograph the pages and upload the results.
At Jack Nack's blog.
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