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First of all, I admit that I do not know if this is the best place to ask this question. As my problem appear to be with pdf files created by TeXMaker and TeXStudio (obviously from a LaTeX file), I am gonna give it a try. Here is the problem:

I make a PDF file with TeXMaker or TeXStudio and then try to put password on "editing" part of it using Adobe Acrobat XI. After putting a password, when I try to reopen that file, strangely I get the following error:

  There was an error opening this document. The file is damaged and could not be repaired.

The I repeated the same process for a scanned document. I didn't run into any problem. It works just fine. I reinstalled my Acrobat XI and it didn't solve the problem. Is there any related setting in TeXMaker or TeXStudio that I'm unaware of? If it helps, I am using Acrobat XI on Mac OS 10.7.5

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Does this answer help? tex.stackexchange.com/questions/31901/… – Boris Jan 30 at 21:38
TeXMaker and TeXStudio have nothing to do with the creation of the PDF. They invoke the TeX command line tools, usually PDFTeX, when you use the Build function. They are only editors for LaTeX. – marczellm Jan 30 at 22:04
A password on a pdf file can be hacked, it is not realy a protection and causes too often a lot of problems (no printing, ...). Are you sure you need this realy? – Kurt Jan 31 at 0:36
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Not all pdf viewers respect password protection. It is really an illusion of protection. Ah. you don't have to hack it ;-) – Harish Kumar Jan 31 at 0:48
Well, if that is the case, what would you recommend for pdf files. I want to make sure nobody can erase my name from the slides and put his name and use it. That's all. I don't mind if they print it... – N Nik Jan 31 at 17:08
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closed as too localized by Martin Schröder, Kurt, percusse, lockstep, Qrrbrbirlbel Feb 2 at 21:53

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