[texhax] watermark info

Walt Burkhard burkhard at yew.ucsd.edu
Wed Feb 16 00:24:51 CET 2005


I am looking for a scheme to include an invisible watermark within a pdf file.  
The watermark would be visible only when viewed with an editor or an appropriate

Currently, files are created using ps2pdf.   I would like this inclusion process to
be fairly quick.  

Do we have anything in CTAN or elsewhere (open source!) that could be used to do this? 

Many thanks in advance.  

Walt Burkhard

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