Access PDF Security properties without opening files?

I have a document library of around 12,000 files which will be sold through a document delivery website. To counter copying etc. we are using a PDF Stamper program to individualise documents at purchase.
Our problem is that we have been supplied a mix of Password Protected and not Protected files.
Is there a way (or a utility) that can scan the library and report which documents are so Protected?
Many thanks.
Brian

The ignorance may be mine. Try var re = /Text\s\(\xFE\xFF\x00(.+)/g;
What that 'says' is look for Text(one whitespace)(the ascii code in hex for the next 3 chars)then remember/store the rest of the line.
I first looked at a sample PSD using a hexeditor to see if I could find a pattern to search. As you pointed out in the frist post, text appears a lot of times and I didn't have any luck finding the pattern that way.
So next I opened the sample with a text editor and found this:(nb I have replace the x00 chars with '00' here so the pattern can be seen)
<<
     /EngineDict
     <<
          /Editor
          <<
               /Text (þÿ00M00y00T00e00x00t00
I think the text is stored in what is called a zero pad text. Which is why if a match is found it loops through the string to remove the x00 chars.
I would have thought it would work with the RegExp I posted. But I changed to re to match as decribed above incase the space or þÿ is the problem.
The only other thing I can think of is I tested this on a PC. If you are on a Mac you might want to look at a pad with a texteditor to see if the þÿ part looks the same. I know that the difference in the way the byte order is read can be a problem. I wouldn' t think so here but...
Also as I noted it runs slow on my maching after the first run. The first run is quick. Every run after that is much slower. It may be just my system but it this might be very slow scanning a folder in a loop.
Mike

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