PDF files are widely used by businesses because of their broad compatibility, but another crucial component of PDF files are their security measures. If you're relying on PDF files for important ...

Sometimes when opening a PDF file, it will give off a security warning. The warning is displayed for PDF files that are transferred or run programs and macros that can be harmful to your computer.

There are times when a PDF truly needs encryption—for instance, if it contains sensitive information and someone just emailed it to you (let’s hope they used another communications method to send you ...