A gaming machine comprising, a main circuit comprising a main processor and a main memory, the main memory storing program code that allows a player of the gaming machine to play the at least one game when executed by the main processor, the program code including authentication code that, when executed, causes the main processor to output challenge data and modify game play if valid response data is not received, and an auxiliary circuit in data communication with the main processor and comprising an auxiliary processor configured to process challenge data received from the main processor in order to output valid response data to the main processor.