AuthenticatorAssertionResponse.userHandle

The userHandle read-only property of the AuthenticatorAssertionResponse interface is an ArrayBuffer object which is an opaque identifier for the given user. Such an identifier can be used by the relying party's server to link the user account with its corresponding credentials and other data.

The same value may be found on the id property of the options.user object (used for the creation of the PublicKeyCredential instance).

Syntax

userHandle = authenticatorAssertionResponse.userHandle

Value

An ArrayBuffer object which is an opaque identifier for the current user. This is not human-readable and does not contain any personally identifying information (e.g. username, e-mail, phone number, etc.)

Examples

var options = {
  challenge: new Uint8Array(26), // will be another value, provided by the relying party server
  timeout: 60000
};

navigator.credentials.get({  publickey: options })
  .then(function (assertionPKCred) {
    var userHandle = assertionPKCred.response.userHandle;

    // Send response and client extensions to the server so that it can
    // go on with the authentication

}).catch(function (err) {
   console.error(err);
});

Specifications

Browser compatibility

See also

• PublicKeyCredentialCreationOptions.user and its id property which contains the same data