Information processing system, information processing method, one or more non-transitory computer-readable storage media having information processing program stored therein

Abstract

A server issues challenge data and transmits the challenge data to a client. The client stores a first parameter, receives the challenge data, generates response data from the challenge data using a response key on the client side, and transmits the response data and the first parameter to the server. The server further receives the response data and the first parameter, specifies seed data for calculation for setting a response key on the server side, using the first parameter, sets the response key on the server side by executing the calculation using the seed data, verifies the response data using the challenge data and the response key on the server side, and notifies a result thereof. The client receives the result.