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I think by "security key" they are talking about working with yubikey instead of the regular public/private ssh keys. I don't know much about yubikey, but it so

I think by "security key" they are talking about working with yubikey instead of the regular public/private ssh keys. I don't know much about yubikey, but it sounds like it is a usb drive for storing you ssh private keys with some software for managing them. They must be promoting yubikey.

mkj 5y ago
OpenSSH specified and implemented it first. The section on U2F describes it https://www.openssh.com/txt/release-8.2 https://www.openssh.com/txt/release-8.2 Not sure if GitHub have pushed their server side code upstream, I think they were using libssh.