Password encryption of pdf prevents unauthorized access of document. Tool adds password into pdf to open with it whenever user double click on pdf. Along with open password, it restricts pdf file printing, editing and copying of document. Thus pdf encryption software provides option to lock pdf data using two types of password as per need. One is open password and another one is pdf owner password, sometimes called as pdf permission password. Pdf permission password is responsible for restricting pdf editing, printing & content copying however pdf open password is asked by the user during pdf open. Our pdf protection solution offers two levels of encryption, 40-bit and 128-bit. Please note that free trial version stamps watermark text above the pdf content. Users need to register the application by purchasing the license key. Pdf encrypt tool is designed to make compatible with Windows XP, Vista, 7 and 8 operating system. Tool is standalone and graphical user interface based. User help file is also attached with the program for making help during product use. All level of users can operate the tool with ease without requiring extra technical skills. Tool supports both install and un-install options.