E-book security via PDF stamping (a DRM alternative)
For our merchants selling e-books in PDF format, we have been working on a
couple of ways to protect their PDFs from distribution.
We tried the DRM angle, but it was really making the buyer experience poor, was
not supported by all the PDF readers and it was apparent that in various scenarios,
it can cause additional customer support issues for the merchants to handle. So,
we decided to scrap that.
And then we worked on the PDF stamping feautre .. basically, we can now stamp
the buyer's name, e-mail and the transaction ID on the top-left of each page of the
PDF before the download. Unlike DRM, this is a simple, non-intrusive way to
discourage buyers from sharing their PDFs.
Purchase a test PDF for $0.00 at https://www.e-
Although we have tested it with various kinds of PDFs, we still consider it an an experimental feature
and we recommend that you enable it for only one your products first, do a test purchase (create a
100% discount code and checkout for $0.00), see how your PDF is coming out and if you are happy
with the results over the next few days, enable it for your other PDFs.
While adding or editing your product, enable "Send payment data to a URL" option and then in the
information URL field enter -
Buyer: Fabian Bole (email@example.com)
Transaction ID: jg-kkcskqd100978ef
a) ZZ should be replaced with your PDF's owner password if you have set one while creating it.
If your PDF does not have an owner password, simply remove the &pdf_pwd=ZZ part.
b) Not recommended - If you do NOT want the buyer to be able to print your PDF, replace
&pdf_allow_print=y with &pdf_allow_print=n
c) Not recommended - If you do NOT want the buyer to be able to copy content from your PDF
(copying is different from extraction, which we disable by default, but we do allow extractio