UNAUTHORIZED CONTROL INHIBITION METHOD, UNAUTHORIZED CONTROL INHIBITION DEVICE, AND ON-VEHICLE NETWORK SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an unauthorized control inhibition method capable of appropriately inhibiting unauthorized control caused by an unauthorized frame flowing through a network.SOLUTION: An unauthorized control inhibition method in a monitoring ECU 100 in a network system including a plurality of electronic control units that transmits and receives via a communication path a plurality of frames including a control frame instructing a control object, for example, a vehicle to perform prescribed control, for example, steering control includes: a receiving step of sequentially receiving a plurality of frames from the communication path; and a determining step of determining, on the basis of an aggregation of frames received in the receiving step in response to steps S21, S22 or the like, whether to inhibit the prescribed control based on the control frame received in the receiving step in response to step S24, for example, whether to transmit an error frame, within a prescribed period prior to the time of reception of the control frame.SELECTED DRAWING: Figure 11