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Old 07-05-2010, 01:10 AM   #3
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CeramicWeasel began at the beginning.
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Apologies for resurrecting this old topic, but i've found it extremely useful for some software development I've been doing and I had a question if anyone is able to answer it.

Is there a way to tell if a PDF document has been given an owner password but not a user password? I don't care what the passwords are, or about the content of the PDF, but I do need to know what *type* of password protections are on it.

It seems that encrypted PDFs get both an /O and /U entry in the /Filter section regardless of the type of password in use.
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