A passkey is a method of user authentication that eliminates the need for usernames and passwords. It also helps prevent security lapses and attacks.
Wikipedia

1. (Optional) Users who have registered with user ID and password first log in to the website
2. Use face recognition or fingerprint registration and authentication device
3. Next time you log in to the website, you only need to authenticate face recognition or fingerprint to enter the website

Google:Google is fully introducing the authentication method "Passkey"
Mercari:Flea market app "Mercari" supports biometric authentication "Passkey" that does not require a password
Docomo:d Account to introduce new authentication methods for web authentication and passkeys for login

A: Mobile device browser B: Computer browser C: Mobile device App (App embeds amiPro SDK) D: Your website E: amiPro cloud service
1. The browser downloads the amiPro JavaScript SDK from your website (App does not need this step)
2. The browser and App call the amiPro cloud service through the SDK for authentication
3. amiPro returns the authentication result to your server