使用一次性密码（OTP）的双因素认证

Nitrokey 3	Nitrokey Passkey	Nitrokey FIDO2	`硝基 U2F<https://docs.nitrokey.com/nitrokeys/u2f/index.html>`_	`Nitrokey HSM 2<https://docs.nitrokey.com/nitrokeys/hsm/index.html>`_	Nitrokey Pro 2	`Nitrokey Start<https://docs.nitrokey.com/nitrokeys/start/index.html>`_	`Nitrokey Storage 2<https://docs.nitrokey.com/nitrokeys/storage/index.html>`_
✓	⨯	⨯	⨯	⨯	✓	⨯	✓

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