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Yubikey Authentication

A hardware-based authentication method using Yubikey devices to enhance security with one-time passwords and encryption.

Understanding YubiKey Authentication


YubiKey is a hardware authentication device that provides strong two-factor (2FA), multi-factor (MFA), and passwordless authentication. Developed by Yubico, it enhances security by preventing phishing, keyloggers, and credential theft.

How YubiKey Works


One-Time Password (OTP)

  • Generates a unique, time-sensitive OTP for secure authentication.

FIDO2/WebAuthn (Passwordless Login)

  • Uses public-key cryptography for passwordless sign-ins to websites and systems.

U2F (Universal 2nd Factor)

  • Enhances security by requiring a physical tap on the YubiKey for authentication.

Smart Card and PIV Support

  • Functions as a hardware-based smart card for secure access to corporate networks.

Challenge-Response Authentication

  • Protects against man-in-the-middle (MITM) attacks by verifying encrypted challenges.

Mitigation and Security Best Practices


  • Require YubiKey for Admin Access – Enforce hardware-based authentication for privileged accounts.

  • Use Multiple YubiKeys – Keep a backup key in case of loss or damage.

  • Disable Legacy Authentication Methods – Prevent fallback to weaker, password-only logins.

  • Enable PIN Protection – Adds an extra layer of security to prevent unauthorized key usage.

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