This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

When a WebAuthn authenticator peforms an authentication via the get() call, the result is a new PublicKeyCredential, the PublicKeyCredential.response value will be an AuthenticatorAssertionResponse object. This object contains both the client data (i.e. - browser data) for the authentication as well as the data from the authenticator to cryptographically prove that the authentication is valid.



Inherited from AuthenticatorResponse.clientDataJSON. Includes the client data for the authentication, such as origin and challenge.
An ArrayBuffer containing information from the authenticator such as the Relying Party ID Hash (rpIdHash), a signature counter, test of user presence and user verification flags, and any extensions processed by the authenticator. This is one of the two fields that is signed over by the authenticator.
A assertion signature over AuthenticatorAssertionResponse.authenticatorData and AuthenticatorResponse.clientDataJSON. The assertion signature is created with the private key of keypair that was created during the create() call and verified using the public key of that same keypair.
An ArrayBuffer containing an opaque user identifier.







Specification Status Comment
Web Authentication Level 1 Working Draft Initial definition.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support Nightly build Nightly build No support No support No support
Feature Android Webview Chrome for Android Firefox Mobile (Gecko) Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support No support Nightly build No support No support No support No support No support

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 Contributors to this page: apowers313
 Last updated by: apowers313,