Quote:
Originally Posted by PandathePanda
I doubt there will be a drm that will be able to be used to trace where a share come from.
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The new social DRM (also called watermarking) can, it includes a number that can be track back to the buyer.
In the Netherlands they use a couple of forms and mixes.
There are books with the watermark in the txt of the html, not visible during reading,if u use sigil you can see it.
The watermark is added to the cover in the picture.
The watermark is visible in the book itself by a copyright message and the last digits of the internal html files have the number, included into the toc.
Example, a new book I recently buyed has the txt: book is protected by a digital watermark: BUYLRAcWD18ZZV00ADJZaQs3XHBbBABNBxsHcwdtUScAIA8iA3 cDLFIk - 54fb16deeb6b0
The filenames have the corresponding numbers:54fb16deeb6b01.html 54fb16deeb6b02.html etc..
Then,there is invisible a thirth watermark:
<div id="x9789021457390.html4" title="Xl9G9a/OlIwf1VJ7z1Saou7BGYXM4k2CFF6g49ypsGJ73BOafvdKSg==" >
It has a data image: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAYgAAAABCAIAAAB L6a7VAAAAfklEQVQ4jZWRBBrAMAzD8v9Pd4fBKJFsWA9lzVJbc Wdmzjlr5/Er3pW7uf9STfrSju7JK4l/zXeFR6VV+KWQRNimtEmtc/acKaKdfzmZTxEhcNHnR5pl1dPdxUl+5VQkzY125bq+XUJSeB0t ja/5aCALIM2cgSj2YKlyf4t3PU+lMetugyOCAAAAAElFTkSuQmCC"
In the content.opf the same number returns:
<dc:rights xmlns:dc="http://purl.org/dc/elements/1.1/">Copie : 54fb16deeb6b0 -</dc:rights>
In the toc.ncx: <content src="Text/54fb16deeb6b06.html#toc_marker_9789021457390_-1"/>
Thats all in one book..it can be removed but then you have to rebuild it from scratch. (I have changed all watermarks for privacy reasons)
It doesn't track to me directly,but it tracks back to the seller,and the seller has to keep a record to which customer this book is sold.
The adobe DRM was okay, remove the drm by whatever program and there are no tracks left, this one is almost impossible to simple loan the epub to a friend,I didn't have seen a program or plugin that is able to remove it.
A hard copy of a book,you can share with everyone,if you share your reader with the epub on it,someone can take it out and distribute it,just copy the file is illegal and the copy has all the watermarking.