PDF Encryption software set password security on any PDF documents. Software is reliable and flexible tool to set user password and owner password on any pdf document. PDF Encrypt tool apply two types of PDF Encryption Level 40-bit RC4 encryption and 128-bit RC4 encryption. User password is required to open pdf document and Owner password is required to modify various permission like Printing, document Assembly, Content Copying, Content Copying for accessibility, Form Filling, Page extraction, Commenting and Signing.