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SSH Certificates and Git Signing
When you’re looking at source code it can be helpful to have some evidence indicating who wrote it. Author tags give a surface level indication, but it turns out you can just lie and if someone isn’t paying attention when merging stuff there’s certainly a risk that a commit could be merged with an author field that doesn’t represent reality. Account compromise can make this even worse - a PR being opened by a compromised user is going to be hard to distinguish from the authentic user.
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