A-PDF Password Security is a desktop utility program that lets you change password security of existing Acrobat PDF files. That means you can protect PDF files with 128 bit encryption or remove the password protection. It can handle either single or batch documents with a wizard. Another convenience feature is hot directory; it can set password security to files automatically when the files are written to a specified monitored directory. With A-PDF Password Security, you can set a PDF file if need a password to open, and/or if have access restrictions. For example, allow or not allow printing, copying content or changing file etc. A-PDF Password Security works with unencrypted or encrypted PDF files and does NOT require Adobe Acrobat.