| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent data to be transmitted from a main control part to a peripheral part from being used for fraudulent control without using a complicated operation, and also to reduce a processing load on the CPU of the peripheral part. <P>SOLUTION: The main control part determines a subsequent setting pattern, and then, generates multiple kinds of authentication information so as to allow an authentication value according to the subsequent setting pattern and the history data of a history data storage means to be set by a setting pattern of this time, and transmits the multiple kinds of authentication information to a subsequent stage part. The subsequent stage part compares authentication data of the multiple kinds of received authentication information with multiple expectation values, to detect the setting pattern, and then, determines the correctness of a control command, on the basis of the history data set by the authentication information and subsequent stage side history data. The subsequent stage part transmits to the peripheral part, subsequent stage authentication result data based on a determination result on whether the detected setting pattern coincides with the this time setting pattern and also the determination result of the correctness, and specifies the subsequent setting pattern. The peripheral part performs prescribed processing in response to the subsequent stage authentication result data received from the subsequent stage part. <P>COPYRIGHT: (C)2012,JPO&INPIT |
