The YubiKey 5 Series provides strong authentication through hardware-based public key cryptography, supporting protocols like FIDO2, FIDO U2F, Yubico OTP, OATH, OpenPGP, and PIV-compatible smart cards. Available in USB-A, USB-C, NFC, and Lightning form factors, it enables passwordless, two-factor, and multi-factor authentication. The FIPS 140-2 certified device features durable water and dust-resistant construction and works across multiple services and devices in both desktop and mobile environments.