Re: [webauthn] Conditional create with existing passkey (#2296)

> But the developers probably never actually want to replace any existing passkeys with a conditional create call, (and possibly bother the user with confirmation UI for a passkey they already had). They could achieve this by passing an excludeCredentials list with all known credential IDs for the user.

Changing the re-registration rules for conditional create could make conditional create more confusing. If a user deletes a passkey from the RP's website, thus causing state desync between authenticator and RP (because the RP didn't use any of the Signal APIs 😏), then a subsequent conditional create request with an empty `excludeCredentials` but same RP ID and user ID should arguably lead to the authenticator overwriting its existing passkey just like with a typical `.create()` call.

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Received on Tuesday, 27 May 2025 14:40:43 UTC