| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent an increase in processing load of a CPU in a peripheral part, and to prevent fraudulent analysis of authentication information and a change using the authentication information even when one kind of authentication information is used for authentication and change. <P>SOLUTION: A main control part generates an inspection value to be stored in an inspection value storage means. When type information are expectation value change data, the main control part generates authentication information having expectation value change data for changing an expectation value to transmit it to a subsequent stage part, and then changes an inspection value according to detection of a control command to be detected. When data types of subsequent-stage type information are the expectation value change data, the subsequent stage part generates subsequent-stage authentication result data based on authentication data of the authentication information received from the main control part to transmit it to the peripheral part. When the data types of the subsequent-stage type information are expectation value change data, the subsequent stage part changes the expectation value by the expectation value change data according to detection of the control command to be detected. The control commands to be detected in the main control part and the subsequent stage part are changed according to the detection of the authentication information having a third inspection value. <P>COPYRIGHT: (C)2013,JPO&INPIT |
