How to password protect a PDF in Adobe Acrobat Reader and shield your sensitive data

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

This Adobe Acrobat alternative now only costs $30 for a lifetime license (was $129)

Right now, you can get a SwifDoo PDF Pro Perpetual Lifetime License on sale for $29.97.