(source: http://gpg4win.org/about.html)synopsis wrote:Gpg4win enables users to securely transport emails and files with the help of encryption and digital signatures. Encryption protects the contents against an unwanted party reading it. Digital signatures make sure that it was not modified and comes from a specific sender.
Gpg4win supports both relevant cryptography standards, OpenPGP and S/MIME (X.509), and is the official GnuPG distribution for Windows. It is maintained by the developers of GnuPG. Gpg4win and the software included with Gpg4win are Free Software (Open Source; among other things free of charge for all commercial and non-commercial purposes).
Making it portable:
(http://www.gpg4win.org/download.html)To create a portable Gpg4win version use the included tool mkportable.exe.
HOWTO: Install Gpg4win with all components and then run from the command line (cmd) in install directory: mkportable.exe [OPTIONS] TARGETDIR. Use mkportable.exe --help to get all options. The portable version does not include GpgOL (Outlook plugin) and GpgEX (Shell Extensions)! Your certificates and settings are saved in the directory 'home' of portable version.
Please note: Does not use portable applications - especially crypto applications - on potentially infected systems
System Requirements: Windows XP, Vista, 7 and 8. Both 32 and 64bit systems are supported.