Allows encryption of your Entourage email. EntourageGPG is a front end for GPG inside Microsoft Entourage. GPG, or GNU Privacy Guard, is an OpenPGP-compatible free public key encryption tool. Please note the requirements listed below on this page, before downloading. EntourageGPG allows encryption of your email in a way that only the person you intend to read it can, and also allows \\signing\\ of those messages, verifying your identity. With public key encryption, it isn't required that the recipient of your message have a previously established password or secret. Instead, you encrypt a message with their freely-available public key. Signing consists of the same thing in reverse\; a \\hash\\, or fixed-sized indentifier, of your message is signed with your private key, then that hash can be decrypted by anyone with your public key and it can be verified that the message has not been modified and it is indeed yours.