| 摘要 |
<P>PROBLEM TO BE SOLVED: To make illegal analysis of authentication information difficult by suppressing increase of a processing load of a CPU in a peripheral part even when authentication is performed with one kind of authentication information. <P>SOLUTION: A main control part extracts an examination value corresponding to a decided data type of next time, and if type information is data for authentication, generates data for authentication having the extracted examination value. The main control part switches a change object pattern with a switching system, and if the type information is data for expectation value change, changes the examination value shown by the change object pattern with the data for expectation value change. The main control part generates authentication information having the data for authentication or the data for expectation value change and sends it to an intermediate part. On the other hand, if the data type of type information at an intermediate side is the data for expectation value change, the intermediate part performs authentication of the main control part with the data for authentication of the received authentication information and the expectation value. The intermediate part switches the change object pattern with the switching system, and if the data type shows the data for expectation value change, changes the expectation value which corresponds to the examination value shown by the change object pattern with the data for expectation value change. <P>COPYRIGHT: (C)2012,JPO&INPIT |
