Passkeys

1. What are passkeys

   Discoverable, device-bound or synced WebAuthn credentials replacing passwords.

2. Passkey terminology

   Terms: relying party, authenticator, credential and attestation.

3. Re-authentication use cases

   Using passkeys for step-up and re-authentication flows.

4. Passkey registration

   Bootstrapping passkeys for new and existing accounts.

5. Conditional UI and autofill

   Sign-in use cases including passkey autofill from the username field.

6. Conditional mediation in WebAuthn

   Browser API to detect autofill-based passkey sign-in support.

7. Backup eligibility and state

   BE and BS flags describing synced credentials.

8. Related origins

   Sharing passkeys across multiple domains with Related Origin Requests.

9. Device support

   Platform and browser support matrix for passkeys.

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