I have several security keys from Yubico (not series 5) and Thetis.
Bitwarden FIDO2 Webauthn works with all.
Bitwarden YubiKey OTP security key doesn’t work with any of them.
A finance web site I use works with all.
Google works with the Yubico keys but not the Thetis.
Can someone describe the different versions of security keys there are? Are they changing over time? Do different manufacturers use different specs?
Right. Is there a list somewhere of the protocols and which keys support them?
Let’s say I want to buy another key as backup, and I don’t want to spend $50 for a Yubico Series 5, how do I know which protocols a different key supports? Plus I want to know which protocols are used by different sites.