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WebAuthn

Web Authentication, the W3C standard that enables phishing-resistant authentication in browsers using public-key cryptography and authenticators (hardware keys, platform biometrics). The basis for passkeys.

WebAuthn defines how browsers, sites, and authenticators (security keys, platform biometrics) cooperate to authenticate via public-key cryptography rather than shared secrets. Each site gets a unique key pair, the private key never leaves the authenticator, and authentication is bound to the site's origin so it can't be phished. Passkeys are the consumer-facing form. As an IAM topic, WebAuthn is the technical foundation of phishing-resistant authentication on the web and one of the most important modern auth advances.

Introduced in: Identity and Access Management

Examples

  • Registering a YubiKey via WebAuthn as a phishing-resistant factor.
  • Using platform biometrics (Touch ID, Face ID) as WebAuthn authenticators.
  • Recognizing passkeys as the consumer-facing presentation of WebAuthn.