University Systems help center

  • Encrypt files using Adobe Acrobat X Pro

Adobe Acrobat X Pro (not Adobe Reader) protects files using it's Protection function. This function does not simply passphrase-protect a file, but it encrypts is using AES encryption.

  1. With your document open, under the View tab, click Tools and from the drop-down list select Protection.
    Encrypt Acrobat 1
  2. From the "Encrypt" tab, select Encrypt with passphrase.
    Encrypt Acrobat 2
  3. From the "Applying New Security Settings" dialogue box, click Yes.
    Encrypt Acrobat 3

  4. From the "passphrase Security - Settings", under Compatibility, choose Acrobat X and later.
    Encrypt Acrobat 4
    1. Ensure that Encrypt all document contents is selected.
      Encrypt Acrobat 4b 
    2. Ensure that Require a passphrase to open the document is selected.
      Encrypt Acrobat 4c
    3. Enter a strong password or passphrase in the Document Open passphrase field, and click OK.
      Encrypt Acrobat 4d
  5. A dialogue box will prompt you to confirm the passphrase you have entered.  Reenter the passphrase and click OK.
    Encrypt Acrobat 5
  6. A dialogue box will notify you that you must save the PDF file for the security settings to take effect. Click OK.
    Encrypt Acrobat 6
  7. Save your PDF document by clicking File and then Save.
    Encrypt Acrobat 7
  8. Verify that (SECURED) appears in the title bar.
    Encrypt Acrobat 8