These keys can then be exchanged with other users, and users may add a digital signature to verify the identity of the sender and the message’s integrity. GnuPG works by encrypting messages using asymmetric key pairs generated by individual GnuPG users.

Developed by the Free Software Foundation, GnuPG is free, open-source and completely compatible with PGP, using a full implementation of the OpenPGP standard ( RFC 4880). Gnu Privacy Guard (also known as GnuPG or just GPG) is an open-source clone of the highly popular email encryption program Pretty Good Privacy (which is now commercially available from Symantec). This ‘how-to’ guide is aimed at making the process clearer, providing step-by-step instructions for setting PGP in Windows.

However, the concepts involved are complex and often confusing a problem compounded by the fact that setting up PGP encrypted email is unintuitive and poorly explained in existing documentation. The best way to keep your private email private is to use PGP encryption.

Gpgwin key