Two-factor Authentication with One-Time Passwords (OTP)¶ Nitrokey 3 Nitrokey Passkey Nitrokey FIDO2 Nitrokey U2F Nitrokey HSM 2 Nitrokey Pro 2 Nitrokey Start Nitrokey Storage 2 ✓ ⨯ ⨯ ⨯ ⨯ ✓ ⨯ ✓ General Instructions Microsoft Google Nextcloud