information respectively on users’ terminal devices, and then login the cloud service through the structure of Public Key and Private Key. Thus, a user’s personal information will not be uploaded to the cloud, while the user can choose to login online by means of fingerprint, voice, or random identifier. This standard supports many leading browsers and system platforms. Such a protocol enables users to process identity authentication through the FIDO2 Standard on many more platforms and devices. The prologue of the passwordless era has been unveiled.