When you add a security key to SSH operations, you can use these devices to protect you and your account from accidental exposure, account hijacking, or malware, GitHub security engineer Kevin ...

GitHub has added support for securing SSH Git operations using FIDO2 security keys for added protection from account takeover attempts.

If you need to work with GitHub, but don't have time to get up to speed with the git command line, Jack Wallen believes the GitHub Desktop app is the perfect tool for the job.

This change only impacts Git operations over SSH using RSA. Web traffic to GitHub.com and HTTPS Git operations are not affected.” Only GitHub.com’s RSA SSH key was replaced.

Here's a quick example of how to securely connect Git to GitHub with SSH KeyGen produced secure shell keys on both Windows and Linux.