Hello, you are using an old browser that's unsafe and no longer supported. Please consider updating your browser to a newer version, or downloading a modern browser.
Training Camp • Cybersecurity Glossary
Universal 2nd Factor U2F is a FIDO hardware security key standard using public-key crypto for phishing-resistant two-factor authentication.
Universal 2nd Factor U2F Definition: Universal 2nd Factor U2F is a FIDO hardware security key standard using public-key crypto for phishing-resistant two-factor authentication.
Universal 2nd Factor U2F is an open authentication standard developed by the FIDO Alliance that strengthens two-factor authentication using hardware security keys that communicate over USB, NFC, or Bluetooth. U2F uses public-key cryptography and binds each credential to the website's origin, providing strong protection against phishing and man-in-the-middle attacks because credentials cannot be replayed against a fraudulent site. U2F was later incorporated into and superseded by the FIDO2 and WebAuthn standards, where it persists as the CTAP1 protocol.
Universal 2nd Factor U2F is one of the topics you'll master in the Security+ Boot Camp.
Security+ Boot Camp →