Secure device authentication

Abstract From the Canadian patent

A method for authenticating a client device into a network consistent with certain embodiments involves at a server device generating a multi-digit , random secret number; displaying the random secret number on a server display coupled to the server device; positioning the client device in close enough physical proximity to the server device to permit observation of the displayed random secret number; at the client device sequentially entering each digit , of the random secret number by actuation of a switch coupled to the client device a number of times equivalent to each digit of the random secret number; and upon correct entry of the random secret number at the client device …