> Be aware literally nothing supports this unless it's your own kernel. Ubuntu 20.04 and later supports this, and, since that's LTS, it means that quite a few

> Be aware literally nothing supports this unless it's your own kernel. Ubuntu 20.04 and later supports this, and, since that's LTS, it means that quite a few servers and machines will be supporting it already. Github/Gitlab aren't supporting it yet, but given how great it is for security, I think they have a big incentive to speed up support. > ed25519-ek does not work on a Yubikey <5, for example. That's no problem, since you can just generate an ECDSA key instead, but yes, not all keys have hardware support for all algorithms.