Receiving information necessary for the random number generated by the AUX terminal. A random number generation device and authentication method for transmitting to an external device, the generated random number back to the AUX terminal. A random number generation device consists of two components; an AUX terminal and a control unit. An AUX terminal can be paired to and receive 'Seed Data' from an external device. A control unit generates a random number using 'Seed Data', and transfers this generated number to an external apparatus via the AUX terminal.