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I've seen several questions similar to this one, but mine is how I can protect my PDF:

  1. Extract contents.
  2. Print.
  3. And, eventually, customize all the meta tag.
Martin Schröder
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Giacomo Alessandroni
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    Welcome to TeX.SX! Do you want to protect the PDF against extracting contents, printing and customizing the meta tags? – egreg Dec 20 '14 at 12:00
  • Exactly @egreg. I would like use LaTeX for generating text books for my students and... I know that this protection isn't very effective, but important for same contents (e.g., exercises, solutions). – Giacomo Alessandroni Dec 20 '14 at 12:08
  • Did you see http://tex.stackexchange.com/questions/11307/is-it-possible-to-produce-a-pdf-with-un-copyable-text ? – egreg Dec 20 '14 at 12:11
  • btw: You don't have to sign with your name since it automatically appears in the lower right corner of your post. – Ruben Dec 20 '14 at 13:36
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    Not a TeX comment but FWIW: twenty year olds will un-protect much more quickly and effectively than you can protect. And, once they do, they will post it on the internet for other twenty year olds to find instantly. You should rethink your strategy. – Jim Hefferon Dec 20 '14 at 13:41

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