[stop50]

The most popular alternatives to hard drm are invisible watermarks. Images get the watermark added and invisible text is added to the booktextes or the booktextes get some spelling errors that are unique to the book.

If i would do the decision i would definitly try to incorporate the watermarks, since some methods are already broken

[degun]

I get this, but what I want to do is prevent unauthorised access altogether. Watermarks help if I want to sue someone after they've gained access to the information.