Notes 
Yubico’s entry-level hardware security key offering FIDO2/WebAuthn support at a lower price point, available in USB-A and USB-C variants, with NFC on select models.
Reviewed by Gabriel Bachmann
Yubico Security Key
yubico.com/products/security-key 1 rating so far*
Rate Yubico Security Key: No account needed
Threat level
Hardened
A hardened pick. Worth the effort once you have chosen to shrink your footprint on purpose. Enough for most people. Threat levels
Our take
If all you need is phishing-resistant FIDO2 login for web accounts and password managers, the Yubico Security Key does the job at roughly half the price of the 5 Series. The trade-off is scope: it drops TOTP, PIV smart card, and OpenPGP support entirely. That is fine for most people who just want to stop password and SMS-based account takeovers, but users who need a single key that also handles SSH keys or encrypted email should step up to the 5 Series instead.
Website at a glance
yubico.com
B score 75
Solid website security headers
Graded by Mozilla HTTP Observatory, tested 3d ago
Inspect this site yourself
Measures the security configuration of the tool's own website, not the privacy of the product itself. A strong tool can still score low here.
Yubico Security Key alternatives
Nitrokey Open-source hardware security key line from Berlin-based Nitrokey, with models ranging from the FIDO2-only Nitrokey Passkey to the Nitrokey 3, which adds PIV smart card, OpenPGP, and TOTP support.
YubiKey 5 Series Full-featured hardware security key from Yubico supporting FIDO2/WebAuthn, TOTP/HOTP, smart card (PIV), and OpenPGP across multiple form factors including USB-A, USB-C, and NFC variants.
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