| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a fraudulent operation detection circuit capable of highly accurately detecting a fraudulent operation to an apparatus which controls the performance state of an algorithm by a state value and strengthening security, to provide an apparatus having the fraudulent operation detection circuit, and to provide a fraudulent operation detection method. <P>SOLUTION: The fraudulent operation detection circuit 10 includes a change condition rule output means 13 for outputting the change condition rule of the state value, a state value generation means 11 for successively generating the state value on the basis of the change condition rule, a state value storage means 12 for storing the state value, and a state value comparison and determination means 14 for comparing the state values before transition of the state value and after the transition and determining abnormal processing when the transition of the state value is not according to the change condition rule. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
