security

using GPG to prove you wrote your code

GPG is cool. You can use GPG to send encrypted messages, sign files to prove you generated them, and sign git commits to prove you committed them. You can get my key here. DigitalOcean has a neat guide to getting started with GPG. It explains asymmetric encryption, key generation and revocation, and key signing and maintenance. Git commit authorship can be modified by anyone, as demonstrated by this tool. But by uploading your GPG public key to GitHub, you allow anyone who trusts GitHub to be sure that commits marked “verified” were actually created by you.
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using Matrix

Matrix is a federated, open source chat system. By federated, we mean that people can communicate across different servers, like in the image below. In that way, it works sort of like email: even though you may use you@gmail.com and I might use me@kylrth.com, we can still write each other emails. In our case, I host the server at matrix.kylrth.com, and you and I can connect to it with various clients.
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