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.

Create a recipient list for the encrypted PDF: Click Search to locate identities in a directory server or in your list of trusted identities, or click Browse to locate the file that contains ...

To encrypt a file from the main toolbox screen, click Protect PDF. Select the file or drag it onto the screen, create a password, and then click Protect 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.

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 ...

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 ...

Researchers from Ruhr-University Bochum and Munster University have discovered what they are calling "severe weaknesses" in the Portable Document Format (PDF) encryption standard that can ...