Disclosed are methods, apparatus and systems, including computer program products, implementing and using techniques for authenticating data for playing a game of chance on a gaming machine. A motherboard is provided in the gaming machine. A peripheral component is in communication with the motherboard over a bus. The peripheral component has access to authentication code in a memory. An authentication instruction message is received over the bus. Responsive to receiving the authentication instruction message, the authentication code is executed on a processor to perform an authentication process on the data. A signal is output, indicating whether the authentication process is successful in authenticating the data. In one implementation, the signal enables play of the game of chance on the gaming machine when the authentication process is successful, and disables play of the game of chance when the authentication process is unsuccessful.