Sending important documents? Learn how to password protect PDFs for extra security using easy steps with Adobe Acrobat and free online tools.

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

With Adobe Reader, signing your documents electronically is simple. Here's how to sign a PDF on Windows using Adobe Reader.

Don't let anyone put words in your PDF. Safeguard sensitive documents, scholarly papers, legal forms and creative works by preventing your Adobe Acrobat PDF files from being copied, edited or ...

How to encrypt and password-protect ZIP files the right way This tip was originally published on IDG Answers, a reader-powered help desk for answering tech questions.

Need to edit a PDF document but don’t want to pay for the more expensive Adobe editors? You can add text to and sign a PDF with just the free Reader program.