8 If you know somebody who uses GPG search for their email address. In order to send an encrypted message you need the recipients encryption key.List Previews allow you to see unencrypted previews of your messages when browsing the message index. If you keep your drafts locally on your computer I wouldn’t bother. 7 Encrypting drafts is important if your drafts folder is stored on another computer (like Gmail). Adjust the settings as desired but I recommend the below settings. At the top of the window you should have a green light and it should say GPGMail is ready. Restart Mail.app and go to the menu Mail - Preferences - GPGMail.It may take a couple of minutes to generate the key, when it’s done you will be able to see your new key in GPG Keychain Access. If somebody knows your passphrase they may be able to decrypt your email messages. It is IMPORTANT that it is difficult to guess and that you are able to remember it. You will be asked to enter a passphrase 6 The passphrase can be as long as you like. When you are finished click Generate key.Expand the Advanced options and adjust the remaining settings to match the screenshot. A fuller explaination is available at: and enter your name and email address. Something encrypted by one key can only be decrypted by the other key, and vice versa. It uses a set of matched keys called your public key and your private key. Click the New icon to generate your encryption keys 5 GPG is based on a cryptographic system called public key encryption.4 You can find it in your Applications folder. Open the newly installed GPG Keychain Access application.You don’t need to customise or tweak anything in the installer, just keep clicking next. 3 Once you’ve downloaded the DMG file simply double click it and run the installer. please check the footnotes for supplementary information. I’ve tried to keep these instructions as simple as possible, 2 It’s a tricky balance to include enough information to make it accessible but not so verbose that people get overwhelmed.If you have any feedback on what could be left out or where you get confused, please leave a comment and I will do my best to improve this document. and use the built-in Mail.app to send and receive email.
The instructions are still approximately correct but there will be differences, especially in with the integration with Mail.app. This tutorial requires that you are on a Mac running Mountain Lion 1 Unfortunately GPG Suite behaves quite differently on older versions of MacOS.
Below is a guide which I hope will allow most people to get up and running with email encryption tools. The good news is that things are better, the bad news is that it’s still a lot more complicated than it needs to be. Given recent events I thought I would revisit the current state of the art and see if things have improved. Tools have existed for a long time to encrypt email messages but sadly they have never been widely used. Using Mountain Lion, Mail.app & GPG Suite
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