AuthenticatorAttestationResponse

Baseline Widely available *

This feature is well established and works across many devices and browser versions. It’s been available across browsers since September 2021.

* Some parts of this feature may have varying levels of support.

See full compatibility

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The AuthenticatorAttestationResponse interface of the Web Authentication API is the result of a WebAuthn credential registration. It contains information about the credential that the server needs to perform WebAuthn assertions, such as its credential ID and public key.

An AuthenticatorAttestationResponse object instance is available in the response property of a PublicKeyCredential object returned by a successful CredentialsContainer.create() call.

This interface inherits from AuthenticatorResponse.

Note: This interface is restricted to top-level contexts. Use of its features from within an <iframe> element will not have any effect.

Instance properties

Also inherits properties from its parent, AuthenticatorResponse.

AuthenticatorAttestationResponse.attestationObject Read only: An ArrayBuffer containing authenticator data and an attestation statement for a new key pair generated by the authenticator.
AuthenticatorResponse.clientDataJSON Read only: Inherited from AuthenticatorResponse, this property contains the JSON-compatible serialization of the data passed from the browser to the authenticator in order to generate this credential — i.e., when CredentialsContainer.create() is called with a publicKey option. This data contains some information from the options passed into the create() call, and some information controlled by the browser.

Instance methods

AuthenticatorAttestationResponse.getAuthenticatorData(): Returns an ArrayBuffer containing the authenticator data contained within the AuthenticatorAttestationResponse.attestationObject property.
AuthenticatorAttestationResponse.getPublicKey(): Returns an ArrayBuffer containing the DER SubjectPublicKeyInfo of the new credential (see Subject Public Key Info), or null if this is not available.
AuthenticatorAttestationResponse.getPublicKeyAlgorithm(): Returns a number that is equal to a COSE Algorithm Identifier, representing the cryptographic algorithm used for the new credential.
AuthenticatorAttestationResponse.getTransports(): Returns an array of strings describing which transport methods (e.g., usb, nfc) are believed to be supported with the authenticator. The array may be empty if the information is not available.

Examples

See Creating a public key credential for a detailed example.

Specifications

Specification
Web Authentication: An API for accessing Public Key Credentials - Level 3 # authenticatorattestationresponse

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`AuthenticatorAttestationResponse`	Chrome – Full support Chrome 67 (Release date: 2018-05-29) footnote Full support	Edge – Full support Edge 18 (Release date: 2018-10-02) footnote Full support	Firefox – Full support Firefox 60 (Release date: 2018-05-09) footnote footnote Only supports USB U2F tokens.	Opera – Full support Opera 54 (Release date: 2018-06-28) footnote Full support	Safari – Full support Safari 13 (Release date: 2019-09-19) footnote Full support	Chrome Android – Full support Chrome Android 70 (Release date: 2018-10-17) footnote Full support	Firefox for Android – Partial support Firefox for Android 60 – 91 (Release date: 2018-05-09) footnote Partial support footnote Only supports USB U2F tokens. Firefox for Android – Full support Firefox for Android 92 (Release date: 2021-09-07) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 13 (Release date: 2019-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – No support WebView Android footnote No support	WebView on iOS – Full support WebView on iOS 13 (Release date: 2019-09-19) footnote Full support
`attestationObject`	Chrome – Full support Chrome 67 (Release date: 2018-05-29) footnote Full support	Edge – Full support Edge 18 (Release date: 2018-10-02) footnote Full support	Firefox – Full support Firefox 60 (Release date: 2018-05-09) footnote footnote Only supports USB U2F tokens.	Opera – Full support Opera 54 (Release date: 2018-06-28) footnote Full support	Safari – Full support Safari 13 (Release date: 2019-09-19) footnote Full support	Chrome Android – Full support Chrome Android 70 (Release date: 2018-10-17) footnote Full support	Firefox for Android – Partial support Firefox for Android 60 – 91 (Release date: 2018-05-09) footnote Partial support footnote Only supports USB U2F tokens. Firefox for Android – Full support Firefox for Android 92 (Release date: 2021-09-07) footnote Full support	Opera Android – Full support Opera Android 48 (Release date: 2018-11-08) footnote Full support	Safari on iOS – Full support Safari on iOS 13 (Release date: 2019-09-19) footnote Full support	Samsung Internet – Full support Samsung Internet 10 (Release date: 2019-08-22) footnote Full support	WebView Android – No support WebView Android footnote No support	WebView on iOS – Full support WebView on iOS 13 (Release date: 2019-09-19) footnote Full support
`getAuthenticatorData`	Chrome – Full support Chrome 85 (Release date: 2020-08-25) footnote Full support	Edge – Full support Edge 85 (Release date: 2020-08-27) footnote Full support	Firefox – Full support Firefox 119 (Release date: 2023-10-24) footnote Full support	Opera – Full support Opera 71 (Release date: 2020-09-15) footnote Full support	Safari – Full support Safari 16 (Release date: 2022-09-12) footnote Full support	Chrome Android – Full support Chrome Android 85 (Release date: 2020-08-25) footnote Full support	Firefox for Android – Full support Firefox for Android 119 (Release date: 2023-10-24) footnote Full support	Opera Android – Full support Opera Android 60 (Release date: 2020-09-23) footnote Full support	Safari on iOS – Full support Safari on iOS 16 (Release date: 2022-09-12) footnote Full support	Samsung Internet – Full support Samsung Internet 14 (Release date: 2021-04-17) footnote Full support	WebView Android – No support WebView Android footnote No support	WebView on iOS – Full support WebView on iOS 16 (Release date: 2022-09-12) footnote Full support
`getPublicKey`	Chrome – Full support Chrome 85 (Release date: 2020-08-25) footnote Full support	Edge – Full support Edge 85 (Release date: 2020-08-27) footnote Full support	Firefox – Full support Firefox 119 (Release date: 2023-10-24) footnote Full support	Opera – Full support Opera 71 (Release date: 2020-09-15) footnote Full support	Safari – Partial support Safari 16 (Release date: 2022-09-12) footnote Partial support footnote Supports only algorithm -7 (ES256). Does not support algorithms -8 (Ed25519) and -257 (RS256). See bug 312081.	Chrome Android – Full support Chrome Android 85 (Release date: 2020-08-25) footnote Full support	Firefox for Android – Full support Firefox for Android 119 (Release date: 2023-10-24) footnote Full support	Opera Android – Full support Opera Android 60 (Release date: 2020-09-23) footnote Full support	Safari on iOS – Partial support Safari on iOS 16 (Release date: 2022-09-12) footnote Partial support footnote Supports only algorithm -7 (ES256). Does not support algorithms -8 (Ed25519) and -257 (RS256). See bug 312081.	Samsung Internet – Full support Samsung Internet 14 (Release date: 2021-04-17) footnote Full support	WebView Android – No support WebView Android footnote No support	WebView on iOS – Partial support WebView on iOS 16 (Release date: 2022-09-12) footnote Partial support footnote Supports only algorithm -7 (ES256). Does not support algorithms -8 (Ed25519) and -257 (RS256). See bug 312081.
`getPublicKeyAlgorithm`	Chrome – Full support Chrome 85 (Release date: 2020-08-25) footnote Full support	Edge – Full support Edge 85 (Release date: 2020-08-27) footnote Full support	Firefox – Full support Firefox 119 (Release date: 2023-10-24) footnote Full support	Opera – Full support Opera 71 (Release date: 2020-09-15) footnote Full support	Safari – Full support Safari 16 (Release date: 2022-09-12) footnote Full support	Chrome Android – Full support Chrome Android 85 (Release date: 2020-08-25) footnote Full support	Firefox for Android – Full support Firefox for Android 119 (Release date: 2023-10-24) footnote Full support	Opera Android – Full support Opera Android 60 (Release date: 2020-09-23) footnote Full support	Safari on iOS – Full support Safari on iOS 16 (Release date: 2022-09-12) footnote Full support	Samsung Internet – Full support Samsung Internet 14 (Release date: 2021-04-17) footnote Full support	WebView Android – No support WebView Android footnote No support	WebView on iOS – Full support WebView on iOS 16 (Release date: 2022-09-12) footnote Full support
`getTransports`	Chrome – Full support Chrome 74 (Release date: 2019-04-23) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 119 (Release date: 2023-10-24) footnote Full support	Opera – Full support Opera 62 (Release date: 2019-06-27) footnote Full support	Safari – Full support Safari 16 (Release date: 2022-09-12) footnote Full support	Chrome Android – Full support Chrome Android 74 (Release date: 2019-04-24) footnote Full support	Firefox for Android – Full support Firefox for Android 119 (Release date: 2023-10-24) footnote Full support	Opera Android – Full support Opera Android 53 (Release date: 2019-07-11) footnote Full support	Safari on iOS – Full support Safari on iOS 16 (Release date: 2022-09-12) footnote Full support	Samsung Internet – Full support Samsung Internet 11 (Release date: 2019-12-05) footnote Full support	WebView Android – No support WebView Android footnote No support	WebView on iOS – Full support WebView on iOS 16 (Release date: 2022-09-12) footnote Full support

Tip: you can click/tap on a cell for more information.

Full support: Full support
Partial support: Partial support
No support: No support
: See implementation notes.
: Has more compatibility info.