Nitrokey 3
🇩🇪 DE
Open-source security key for FIDO2, OpenPGP and PIV with German-made hardware
Features
Authentication
- FIDO2/WebAuthn for passwordless sign-in
- U2F for two-factor authentication
- Up to 100 discoverable passkeys (3A Mini) or 30 (NFC models)
Smart-card cryptography
- OpenPGP Card for signing, encryption and authentication
- PIV for business smart-card applications
- S/MIME support for email encryption
Passwords and OTP
- Password Safe for stored passwords and OTP credentials
- One-time password generation
- Up to 50 entries in Password Safe
Device security
- PIN-protected storage of cryptographic keys and certificates
- Common Criteria EAL 6+ certified secure element
- Open source and open hardware
Administration and updates
- Nitrokey App 2 for device management
- pynitrokey/nitropy tools for CLI management
- Firmware updates available
Compatibility
- Windows, Linux, macOS, Android and iOS support
- Microsoft Entra ID support for credential provisioning
- KeepassXC support for unlocking
EU Trust Profile
What we verified against public sources, last checked 2026-11-10. Every point links to its evidence.
- Evidence →European legal entityNitrokey GmbH, Teltow (DE)
Registered at Amtsgericht Potsdam, HRB 32882 P.
- Evidence →Open source
Firmware repository is public, but the specific license is not confirmed in the provided sources.
- Evidence →Local-language support
Email support is explicitly offered in German, English, and French.
We list only what we could verify against a public source on the check date. A point that is absent was not established either way — it is not a finding against the vendor. The vendor's own information prevails.
Work at Nitrokey 3?
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Reviews
Recurring themes, synthesized from public reviews across portals.
What users value
- Multi-protocol support: FIDO2/WebAuthn, U2F, OpenPGP, PIV and OTP in one device
- Open hardware and firmware design with German production and SE050 secure element
- Wide platform compatibility across desktop and mobile operating systems
- Multiple form factors: USB-A, USB-C, Mini and NFC variants
- Straightforward everyday use for basic FIDO2 authentication
- Touch-button activation and PIN protection for device-level security
- One-time purchase with no subscription fees
Where users see room to improve
- · Advanced use cases (OpenPGP, PIV, SSH) require steeper setup and command-line tools
- · Early adopters reported shipping delays, incomplete features and slow stabilization
- · Passkey capacity varies by model and firmware, with some users citing a 17-credential limit
Integrations
Nitrokey 3: frequently asked questions
- Which tools does Nitrokey 3 integrate with?
- Nitrokey 3 connects with Microsoft Entra ID, WebAuthn/FIDO2, OpenPGP/GnuPG and KeepassXC.
Feature, pricing and integration details are based on web research (as of 2026-11-10), without guarantee, errors are possible. The vendor's website prevails.