OpenPGP in browsers
However, unlike GNU Privacy Guard (GnuPG) the software currently offers no way of compressing data; the developers suggest that, to create GPG4Browsers-compatible messages with GnuPG, users add the
-compress-algo none option to their setup. The source code of GPG4Browsers is available as a ZIP archive or from a Subversion repository and is licensed under version 2.1 of the GNU Lesser General Public License (LGPL). Those who want to keep track of its development can access the Subversion repository.