Cloud-based passkeys are okayish (1pass, bitwarden), as they are available on multiple devices.

However not all devices play well with it, e.g. iOS and Android don't ask 1pass for the passkey. I also couldn't make it ask NFC for my hardware Yubikey with passkeys, but maybe I just did something wrong.

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sitting33 17 hours ago | parent [-]

Passkeys are supposed to cover two authentication factors at once (having your device + biometrics). Because your yubikey doesn't implement biometrics, it's only a single factor, and thus cannot be used as a passkey.

	▲	deepsun 16 hours ago \| parent \| next [-]
		Yubikey can be used as passkey atorage, I do it on Linux desktop/laptop with passkeys. It requires touching it (but no biometrics). I just couldn't make Android ask my hardware device, it wants to handle passkeys by itself. It's false that passkeys cover biometrics. They cover password + OTP (aka 2FA aka MFA, although BestBuy requires OTP even after logging in with a passkey).
	▲	palata 16 hours ago \| parent \| prev [-]
		Well a Yubikey can require a password/PIN. So having your device + knowing the password.