Quote:
Originally Posted by Klecks
They rather use social DRM (Watermark) these days. Which means you can use every reading software you want without to bother Alf, but they tell you "We have marked the book. We dont tell you how. The mark is not removable. If you upload the book to a pirates side - we will know it's yours."
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EPUBs are so simple that it's impossible to "watermark" them in a way that can't be removed trivially. I'm sure the threat does keep honest people honest, but it does nothing to keep dishonest people from sharing the book after removing the watermark. In that way, it's just like DRM.