How to encrypt a PDF on Mac OS Preview, the Mac OS application that opens most popular file types, has many bonus features for modifying documents. One of them is encrypting PDF files.

If you want to password-protect your PDF documents from outside interference, then maybe you should give PDF Page Lock a test run. It is a free encryption software that lets you easily encrypt PDF ...

Do you share PDF files with other people? Here's how to password protect a PDF on Windows for protection against unauthorized access, editing, and printing.

With a few steps you can set up an easy way to encrypt PDF files generated from the standard print dialog window.

If you have a confidential PDF you want to password protect, you have a few ways to do that on your Windows 11 PC. You can use a desktop app or a web-based tool to encrypt your PDF files.

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.

Abobe Acrobat Pro Too Expensive? Here's How I Password Protect PDFs (For Free) Don't let your sensitive data fall into the wrong hands. These tools encrypt important PDFs without the need to spend ...

How to Use DRM Encrypted PDF Files on a Kindle. Your Kindle device can be a more productive way to work on your documents for reading and annotation. Even documents encrypted with DRM technology ...

How to Merge Encrypted PDF Files. Small businesses working with sensitive PDF documents may choose to encrypt those documents. An encrypted PDF is password protected, which means you cannot open ...