Signing Your Git Commits: From Zero to Verified
Anyone can commit code to a repository pretending to be you. Git's author fields (user.name and user.email) are free-form text that any client can set to anything. Cryptographic commit signing closes that gap by mathematically binding a commit to a key pair that only you control. Once you add a verified badge to your commits on GitHub or GitLab, every reviewer can be confident that the code actually came from you.
This post walks through the full picture: why signing matters, how to configure your git client correctly, how to generate and publish a GPG key, how to use your platform's no-reply address so you never expose your real email, and how to automate Signed-off-by trailers with git hooks, complete with copy-paste examples for every step.