I mentioned a cool tool yesterday called pdftk that I use at my day job to merge multiple PDF documents into a single PDF. Well that isn’t all pdftk can do! You can also use it to password protect PDF files for better security!

Let’s say I have a PDF called sensitive.pdf with information I don’t want anyone to see. I can protect it with a password by running the following command via the terminal:

#pdftk sensitive.pdf output protected.pdf user_pw SuperS3cr3tPW2014

If you aren’t following the command above you input the original PDF (sensitive.pdf) and output a new PDF called protected.pdf and assign it the password SuperS3cr3tPW2014.

Now you can delete the original file and you can keep the new password protected PDF

Categories: LinuxTech Tips

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