Thank you everyone for your reply! I definitely want to avoid using 3rd party tools so Dov's recommendation is heading in the right direction. I agree that anyone can forge a PDF so I will limit my expectations to just making it difficult. Specifically, I want to provide them with a document that they must OCR, if they want to manipulate it. I have tried saving with a password but I can still open/edit/save the PDF on other computers without ever being prompted for the password. The only time it prompts for a password is when I try to change security settings, which isn't necessary for editing. What's the trick to making the password prevent editing?
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