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.

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.

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.

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 ...