| 摘要 |
<p>PURPOSE:To easily protect the secret of information and to prevent a main body from being stolen by preparing an owner identifying device for each information processor and using the owner identifying device corresponding to the information processor to transmit and receive the identification number. CONSTITUTION:When an owner of an information processor 10 turns on the power source of the information processor 10 and depresses a switch 3 of an owner identifying device 20, information of the identification number written in a ROM 1 of the device 20 is taken into a transmitter 4, and the identification number is transmitted by a radio wave. The information processor 10 receives this radio wave and converts it to an electric signal. A comparator 6 takes in the identification number of the device 20 from a receiver 5 through a bus B and compares it with the identification number registered in a ROM 2. The comparator 6 sets a signal line D to the high level in the case of disaccord bus sets it to the low level in the case of coincidence.</p> |
