PDFex can bypass encryption and password protection in most PDF readers and online validation services Researchers in Germany have invented a new hack that can allow someone to break the ...

Bring your multiple PDF files into a single folder. Select all your files, right-click a chosen file, and choose Show More Options > 7-Zip > Add to Archive. On the window that opens, click the "Enter ...

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 ...

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. If you use Outlook, you can use Adobe ...