US Patent 11792024 System and method for efficient challenge-response authentication

A system, apparatus, method, and machine-readable medium are described for fast authentication. For example, one embodiment of a system comprises: a local challenge generator of a client apparatus to generate a challenge on a client device using a derivation function; an authentication engine of the client apparatus to generate a challenge response as defined by a specified challenge-response protocol; the authentication engine to transmit the challenge response to a server, and the server to validate the challenge response, at least in part, by determining whether the challenge was generated within a specified time window.