FIDO2 Authentication is a modern, phishing-resistant authentication standard developed by the FIDO Alliance and the World Wide Web Consortium (W3C). It enables users to securely access online services without relying on traditional passwords, which are often vulnerable to attacks. Instead, FIDO2 uses public key cryptography, allowing users to authenticate with hardware security keys, biometrics (like fingerprints or facial recognition), or PINs. The user's private key never leaves their device, enhancing security and privacy. FIDO2 is widely supported by major browsers and platforms, promoting a passwordless future and significantly reducing the risks of credential theft and phishing attacks.