GnuPG is a file encryption.
Edit By BS Editor: GnuPG is a command-line based File Encryption and digital signature application. WinPT makes GnuPG easy to use with a graphical user interface for Windows. The installation program is laid out in such a way, that also allows users with fewer rights to install and protect their files and emails against unauthorized viewing. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. you can free download GnuPT 3.6.6 now.