So I have a number of pdf files that are ‘locked’/password protected. I’ve used pdf unlocking apps in the past which seem to open and print the pdf to a new pdf that doesn’t have protection.
This batch of files are different though. I can open them/view them in a pdf reader but any unlock app doesn’t ‘see’ them (I’ve tried several). I can’t drag the file to the unlock app and when I try to search it using the file explorer pop up it doesn’t list the pdf files which i know are in the directory.
I’m able to view a single locked file (as mentioned) and print it to a new pdf but I’ve got quite a few …
ideas? Is there an attribute or something I’m missing that can be changed?
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from hacking: security in practice https://ift.tt/WHlUwfs
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