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What do you mean with more complex drm files? The script sometimes doesn#t work when you have some particular pdf 1.5 features included.
That's not the fault of the decryption routine but mostly the 'dump method' which has to be adjusted.
Before you ask, I shortly checked it out but I'm working on my thesis right now and haven't had the time to go deep into it.
Additionally there seem to be a fileopen drm plugin for the Adobe Reader which also hasn't been circumvented. Might be includable in the actual script.
We'll see ...
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