Re: [webauthn] How to know if a user has already registered a device? (#1749)

I do not understand why `credentials.exists(credentialId)` is a super-cookie? Because it really is `credentials.exists(rpId, credentialId)`. So `credentialId` makes sense only for `ipId` where only `ipId` which matches the site origin can use. So you can only check for `credentialId` for your site. In fact, I think only `credentials.exists(rpId)` is all that is needed. Is there any credential stored for the RP? How is that a super-cookie?

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Received on Thursday, 23 November 2023 22:37:49 UTC