Quote:
Originally Posted by hansl
I think a watermark with accumulating "sold-by" and "bought-by" statements on each sale transaction in the original and the sold copy could be sufficient. The seller would be obliged to remove his copy. The watermark would prevent the seller from selling an ebook twice. Seller and buyer are identifiable. This means whenever authorities get hold of a storage medium of yours with previously sold content, they've gotcha.
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If these records are kept locally, as part of the book file, a simple backup/restore gets around it. The only way to make this work is to require authorization from a remote server when you sell the book - and really, when you open it to read it, too. And we know how committed Sony is to keeping their cloud going for their customers. Why
anyone would ever trust them again, I have no idea.