Patent ID: 7350064

Claim:
A computer system comprising: an identification device comprising: a memory for storing an identification code; and a first wireless module for receiving a radio identification signal and then emitting a radio user signal comprising the identification code; wherein the first wireless module is also capable of generating a corresponding electrical data signal while receiving a radio data signal, and the memory is capable of storing the corresponding electrical data signal; and a host comprising: a processing module for controlling operation of the host; a second wireless module for emitting the radio identification signal and for receiving the radio user signal; a power supply for supplying power to the processing module while receiving a power control signal; and a control module electrically connected to the power supply; wherein before the power supply supplies power to the processing module, the control module is capable of checking whether the identification code within the radio user signal matches a predetermined identification code as the second wireless module receives the user signal; if the identification code within the radio user signal matches the predetermined identification code, the control module is capable of transmitting the power control signal to the power supply.