Illegal message detection device, electronic control device equipped with illegal message detection device, illegal message detection method, and illegal message detection program

摘要

A fraudulent message detection device that detects a fraudulent message sent to a bus detects a deviation from the edge of a signal in order to adjust a sampling point for acquiring a logical value of a signal on the bus in one bit period. The resynchronization detection unit (124) for determining whether or not to execute resynchronization, and the sampling point used before the detection in the 1-bit period after the edge is detected by the resynchronization detection unit (124) A transmission / reception control unit (122) that obtains a first logical value that is a logical value of the bus and a second logical value that is a logical value of the bus at the sampling point after resynchronization based on the edge; And a comparison unit (627) that compares the second logical value and a fraud detection processing unit that executes fraud detection processing when the first logical value and the second logical value do not match ( 28) and a.