This page hosts Dan's GPG key. Using this, you can:
- Check that an message signed by Dan can only have been written by him - here's a quick-guide to doing that.
- Encrypt a message for Dan that only he will be able to read.
You can also acquire the key using OpenPGP Web Key Directory.
But I heard PGP/GPG was broken (e.g. EFAIL), etc. That's not quite true, and it's still better than unencrypted email. If you're concerned, feel free to send me a Signal message instead. Or, if you must, WhatsApp.
There are some great guides to using GPG. Download Dan's GPG key or copy-paste it from below. You can also find him on Keybase.io.