Encrypt PDF - 256 bit - Version 1.0.1 Encrypt Adobe pdf documents with adroit pdf locker software, add pdf open password, restrict pdf editing, printing & copying using owner permission password. Protect pdf content with strong RC4 & AES 128-bit & 256-bit encryption. Program is user friendly and graphical user interface based. Program supports installation on Windows Vista, XP & 7 operating system. Free copy of pdf encryption is available to download to evaluate its performance. Tool is very helpful if your pdf document contains private and confidential content. Once protected with user password, only authorized person can open document with correct password input. If owner permission password is also applied on document, the restricted features can not be accessed by unauthorized person. With owner restriction option, you can easily disable pdf print button, disallow pdf editing, deny pdf copying, form filling, signing, commenting & conversion.