Yubikey

• Developed by Yubico
• Provides access to a physical second factor authentication

Features

• FIDO
• Fido U2F: Fast Identity Online / Universal Second Factor
• FIDO2
• Passwordless evolution of Fido
• NFC
• Near Field Communication
• Alternative to USB
• Biometric Access
• Unlock the key with fingerprint
• OTP
• One-time password. Used in combination with user + password
• TOTP
• Time-based one-time password
• Changes automatically based on time (usually 30s)

Models

• Security Key Series
• Least features
• Yubikey 5 Series
• Some offer NFC
• Supports authentication for Windows, Macos and Linux
• Yubikey Bio
• Fingerprint reader built-in
• However, fewer features than 5 Series
• Supports authentication for Linux only
• YubiHSM
• Intended for infrastructure