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.

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 ...

Password-protect PDF documents with LibreOffice LibreOffice offers a superlative encryption feature to password protect and safeguard your documents. You can encrypt a new document, as well as an ...

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 ...

In this article I’ll concentrate on describing how to create virtual encrypted disks, which enable you to protect specific sensitive documents without having to encrypt your entire drive.

Any help will be appreciated!” The quickest way to do this is to ZIP the PDF file and protect the ZIP file, or use Microsoft Office’s built-in encryption tools to create a password.

Have a private document on your desktop OS? Here's how to keep it secure on Linux, MacOS, and Windows.