4 ms·
It's not that kind of watermark. Rather, usually at the beginning, there'll be some text saying who bought the book, along with some kind of identifier. The id
by donatzsky 8y ago
It's not that kind of watermark. Rather, usually at the beginning, there'll be some text saying who bought the book, along with some kind of identifier. The id can also be hidden inside the file.
- miki123211 8y agoThe books I've investigated had a text saying "This copy belongs to: %s" where %s was an email address at the beginning, and an invisible hex string at the end of every chapter. The string had a width and height of 1px, so most conventional readers didn't show it at all.