| 摘要 |
An inventive circuit comprises a first operation unit (18) for carrying out an operation, whereby the first operation unit, when carrying out the operation, changes its state in a first manner. The circuit also comprises a second operation unit (20) for carrying out the operation, whereby the second operation unit, when carrying out the operation, changes its state in second first manner that differs from the first. The circuit additionally comprises a monitoring device (22) for verifying the state of the first operation unit (18) and the state of the second operation unit (20) and for signaling an alarm when the state of the first operation unit and the state of the second operation unit do not have a predetermined relationship with one another. Lastly, the circuit comprises a device (24) for taking a measure in response to a signaling of the alarm. The improvement consists of being able to detect manipulative attacks more effectively or with a higher probability. |
