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I am adding metadata to my document:

\hypersetup{
    pdftitle={ddd},
    pdfsubject={aaa},
    pdfauthor={xxx},
    **pdfkeywords={666},**
    pdfproducer={yyy!},

And there is a password string here, however the document does not ask for a password when opening it. How to password protect a document?

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    pdfkeywords is for keywords, not passwords. – DG' Jun 16 '20 at 8:05
  • Thank! However, as I understand it, without third-party software, it is not possible to set the password directly from the latex – Антон Jun 16 '20 at 8:29

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