clientDataJSON
clientDataJSON is a component of the Web Authentication (WebAuthn) protocol. It represents the client-side data that describes a credential creation or assertion ceremony, and its content is transmitted as part of the authenticator's response. The data is produced by the browser, encoded as a JSON object, converted to UTF-8 bytes, and then base64url-encoded to form the clientDataJSON value included in the response.
The JSON object contained in clientDataJSON typically includes several fields. The type field indicates the operation,
During verification, the relying party decodes clientDataJSON from base64url, parses the JSON, and validates its contents.
In the overall WebAuthn flow, clientDataJSON is used alongside other data produced during the ceremony, such