HSM Features# Nitrokey 3 Nitrokey Passkey Nitrokey FIDO2 Nitrokey U2F Nitrokey HSM 2 Nitrokey Pro 2 Nitrokey Start Nitrokey Storage 2 ⨯ ⨯ ⨯ ⨯ ✓ ⨯ ⨯ ⨯ SMIME Smart GPA DNSSEC (Linux only) Hard Disk Encryption Automatic Screen Lock (Linux only) Import Keys Certs Stunnel (Linux only) Certificate Authority Ipsec (Linux only) N-of-m Schemes Pkcs11-URL Apache 2 TLS