For a technical standpoint it's a system that generates OTPs from another Auth source, like biometrics or even a classical password. From a practical one it's

For a technical standpoint it's a system that generates OTPs from another Auth source, like biometrics or even a classical password. From a practical one it's another way to get people to relly on major comporations for all Auth ises so they yet have another thing anchoring to their ecosystem.