Hello,
I'm interested in a quick and fast way of watermarking existing pdf files.
As I have seen in the FAQ the following address is ..temporarily unavailable:
http://www.java-tips.org/other-api-tips/itext/how-to-display-watermark-in-pdf-documents-from-2.html
Is there a mirror for this article, or another good guide?
The main thing that I am going to need is to add an invisible watermark (like a
transaction ID) to a pdf file, and later I will need
a way to retreive the watermark from the pdf file.
By invisible I mean that the user that will read the pdf file, won't be able to
see the watermark (although this prerequisite may not be needed after all,
thus the user may be allowed to see it).
Thanks in advance,
Antony
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