Google is starting to replace their 2-factor authentication with passkeys. Simply stated, passkeys use biometics and secured storage of whatever device you create the passkey on. For example, I can create a passkey on my Macbook Air M1 so that I can simply use the finger print scanner on the device rather than having to enter a password. In this case the Macbook stores the passkey and the passkey uses whatever biometrics it has for authentication. Same thing works with Windows and Windows Hello. #

In my experience Google's passkey support does not extend to Chrome on Linux. One way that I think it should work is via a FIDO2 USB key like the Yubicon keys that I own. I actually created the passkey on a Yubicon on my Mac but whener I try to use it with Linux, it errors out. I suspect this is more to do with the operating system rather than the key. #