While non-discoverable credentials are not considered passkeys, you should still be aware of them as there are still a number of valid scenarios where your application will need to support the use of them - especially as they are still valid WebAuthn credentials. These are credentials that cannot be generically invoked by a relying party. Instead a user will need to prompt the relying party with a username (user handle) to have the application provide a list of credential IDs to denote which credential(s) can be leveraged for authentication.
Fido2 webauthn non-discoverable credentials are completely unlimited. Because the private key is on the yubikey directly. The only downside of this, is you have to type in your username first, but I think that’s an upside personally. I do not want anybody who compels disclosure of my hardware security key, to see all the accounts on it.
The non-discoverable keys cannot be removed from the device. The secret is non-transferable.
In the yubikey bio series, this is implemented as a second factor. So you log in, and then present your hardware key as a second factor. You need your fingerprint, the key, your username. Fairly secure.
I think this is a more secure model than pass keys as they’re being promoted today
Fido2 solves this already …
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https://developers.yubico.com/Passkeys/Passkey_concepts/Discoverable_vs_non-discoverable_credentials.html
Fido2 webauthn non-discoverable credentials are completely unlimited. Because the private key is on the yubikey directly. The only downside of this, is you have to type in your username first, but I think that’s an upside personally. I do not want anybody who compels disclosure of my hardware security key, to see all the accounts on it.
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The non-discoverable keys cannot be removed from the device. The secret is non-transferable.
In the yubikey bio series, this is implemented as a second factor. So you log in, and then present your hardware key as a second factor. You need your fingerprint, the key, your username. Fairly secure.
I think this is a more secure model than pass keys as they’re being promoted today
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Yes you need to unlock the The hardware key
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I think the argument and the article is users just are going to avoid this whole confusing mess
And I would absolutely like the ability to use hardware key to log into multiple accounts on the same service.