Pdf encryption software to lock pdf files with user password and owner restrictions. Open password is asked by user to open locked pdf. Pdf restrictions may locked printing, disallowed editing, protected copying & form filling etc. These restrictions are optional and pdf owner can select desired item to lock. Pdf protection software is robust and easy to use Windows utility supports Windows XP, Windows Vista & Windows 7 operating system. Once document is protected with password lock, it can only be opened by authorized user after supplying correct open password. Latest version is compatible with RC4 and AES encryption lock, supports 40-bit and 128-bit long encryption key protection. Tool provides wizard style user interface; easy to import pdf, set password settings and finally apply encryption on selected documents. Free version provides evaluation of actual product but adds watermark on the output pages.