Anyone Can Commit Code as You on GitHub (Here's How to Stop Them)

Git commits can be easily impersonated by anyone who knows your name and email, making them appear as if you authored them on GitHub. GPG commit signing provides cryptographic proof of authorship through public-key cryptography. The guide walks through installing GPG Suite on macOS, generating a GPG key pair, adding the public key to GitHub, and configuring Git to automatically sign all commits. It covers key management best practices like setting expiration dates, backing up private keys, and troubleshooting common issues. While most developers don't actively check verification badges, organizations increasingly require signed commits for compliance, security audits, and protection against supply chain attacks.