NIST Certification: FIPS 140-3 validated for government and regulated organizations (Overall Level 2, Physical Security Level 3). Works with 1000+ Accounts: Supported by Google and Microsoft accounts, Identity Access Managers, password managers and 1000+ popular services. It works with operating systems and browsers including Windows, macOS, Chrome OS, Linux, Chrome, and Edge. Fast & convenient login: Plug in your YubiKey via USB-C or Lightning and tap it to authenticate. No batteries, no internet connection, and no extra fees required. Most secure passkey: Supports FIDO2/WebAuthn, FIDO U2F, Yubico OTP, OATH-TOTP/HOTP, Smart card (PIV), and OpenPGP. That means it’s versatile, working almost anywhere you need it. Built to last: Made from tough, waterproof, and crush-resistant materials. Made in Sweden with the highest security standards. Primary & spare keys: Just like having a spare house key, we recommend buying two YubiKeys—one for daily use and one as a spare. That way you’ll never get locked out of your accounts. Yubico Authenticator App: Compatible with the safest authenticator app experience across mobile and desktop. YubiKey 5Ci FIPS (140-3)