We would like to publish some ebooks(epub files) and sell them through our web shop. We would like to be able to “track” these ebooks by adding some information(example: name of the customer) to the file. I have read that some people are putting comments in jpegs etc. or trying to hide the information between tags. I wonder if there are any other, or better solutions? I was thinking of putting the MD5 hash of the customer ID or something similar, but i don’t know where should it go.
I know that experienced users can strip these solutions out easily, but i am trying to come up with some sort of solution for the average user. Thanks for your help.
We would like to publish some ebooks(epub files) and sell them through our web
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You’re looking for a form of steganography. Lifehacker has some tips on this.