GPG Plugin Portable 2.0.27 is a complete and free implementation of the OpenPGP standard allowing you to encrypt and sign your data and communications. It is an add-on used by other portable apps like Thunderbird Portable and SeaMonkey Portable. It's packaged in PortableApps.com Format so it can easily integrate with the PortableApps.com Platform. And it's open source and completely free

Features
- Full replacement of PGP.
- Does not use any patented algorithms.
- GPLed, written from scratch.
- Can be used as a filter program.
- Full OpenPGP implementation (see RFC4880 at RFC Editor).
- Better functionality than PGP and some security enhancements over PGP 2.
- Decrypts and verifies PGP 5, 6 and 7 messages.
- Supports ElGamal, DSA, RSA, AES, 3DES, Blowfish, Twofish, CAST5, MD5, SHA-1, RIPE-MD-160 and TIGER.
- Easy implementation of new algorithms using extension modules.
- The User ID is forced to be in a standard format.
- Supports key and signature expiration dates.
- English, Danish, Dutch, Esperanto, Estonian, French, German, Japanese, Italian, Polish, Portuguese (Brazilian), Portuguese (Portuguese), Russian, Spanish, Swedish and Turkish language support.
- Online help system.
- Optional anonymous message receivers.
- Integrated support for HKP keyservers (wwwkeys.pgp.net).
- Clears signed patch files which can still be processed by patch.
- and many more things….

GPG Plugin Portable is packaged in a PortableApps.com Installer so it will automatically detect an existing PortableApps.com installation when your drive is plugged in. It supports upgrades by installing right over an existing copy, preserving all settings. And it's in PortableApps.com Format, so it automatically works with the PortableApps.com Platform including the Menu and Backup Utility.

GnuPG allows to encrypt and sign your data and communication, features a versatile key management system as well as access modules for all kinds of public key directories. Both Thunderbird Portable and SeaMonkey Portable will utilize GPG Plugin Portable automatically from the CommonFiles directory. It can also be installed directly to ThunderbirdPortable\App\gpg and SeaMonkeyPortable\App\gpg

Supersedes old Thunderbird and SeaMonkey GPG plugins
This supersedes the older Thunderbird Portable and SeaMonkey Portable GPG plugins. The launchers of Thunderbird Portable 31.5.0 and SeaMonkey Portable 2.33 will automatically use this new plugin from the %PORTABLEAPPS%\CommonFiles\GPG directory if it is present. Be sure you're using the latest releases instead of allowing the contained app to update itself. GPG data will still be stored within SeaMonkeyPortable\Data\GPG and ThunderbirdPortable\Data\GPG. Unlike the older GPG plugins, this new plugin works with both Thunderbird Portable and SeaMonkey Portable and will be automatically kept up to date by the PortableApps.com Platform.