Microsoft Office lets you encrypt your Office documents and PDF files, allowing no one to even view the file unless they have the password. Modern versions of Office use secure encryption that you can rely on–assuming you set a strong password.

When you go to save your Word document, go to File then click Save As

Select the Browse option

Save As Image

Change the file type to PDF

Click on Options

Change PDF Options

Tick the ‘Encrypt the document with a password’ box

Encrypt Document

Click OK

Enter a secure password and then reenter it, Click OK

Click Save

The PDF will now be encrypted with a password