[geofft]

> So if a sheepish new employee fails to revoke them, why blame git or any other system? We have contracts, insurance and then criminal code for people who fail to follow protocols.

Because you won't know that a protocol isn't being followed. Your contracts, insurance, and criminal code won't cause you to realize that an employee caused an infosec incident if they don't tell you (and neither will your math and cryptography). And the more you threaten use of the criminal code, the less likely people are to admit that they made a mistake.

You can either build defense in depth (e.g., regular secret rotation, policies on use of GitHub in the first place or better yet automation that only pushes publicly after internal review, DLP via a corporate MITM, segregating your open source dev from your secret dev, etc.) or you can let your single defense get breached and have no idea.