To password protect a PDF in Adobe Acrobat Reader, you'll need the paid Pro version, which starts at $14.99 a month. You can password protect a PDF in Adobe Reader by ...

Don't let your sensitive data fall into the wrong hands. These tools encrypt important PDFs without the need to spend hundreds of dollars on the full Adobe Acrobat program. At some point you’ll likely ...

Click the "Tools" pane then the "Protection" panel in Adobe Acrobat. Choose "Encrypt," then click the option to "Encrypt With Password." From the Permissions pane ...