Tiqr predates it and does the same thing. However, U2F and UAF from FIDO alliance are the new protocols that are being standardized, and they're looking good too.
It is even designed to inherently resist tracking across services by using unique keypairs per service in a clever way. No device identifier is ever shared.
It is even designed to inherently resist tracking across services by using unique keypairs per service in a clever way. No device identifier is ever shared.