Easy PDF password security is trusted and reliable utility software for changing the password security of existing PDF documents. That means you can either protect your PDF files with 40-bit/128-bit encryption, or remove existing password protection. There are three operating modes available, including single PDF file, batch PDF files and hot directory. Easy PDF Password Security is a standalone program, requiring no other software to support, and it can work under almost all Windows systems, including Windows 98,ME, NT, 2000, XP, VISTA and 7. Also it supports encrypt or decrypt PDF files which are up to Adobe 9 version.