METHOD FOR DETERMINING DETECTION CRITERION OF ILLEGAL COMMUNICATION, SYSTEM FOR DETERMINING DETECTION CRITERION OF ILLEGAL COMMUNICATION AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To determine a message to be used as a criterion for determining whether or not each individual message transmitted to an on-vehicle network is an attack message.SOLUTION: A method for detecting a criterion message to be used for detecting illegal communication includes: a communication pattern identification step which identifies, from information related to an attack message to the on-vehicle network system, a communication pattern indicative of a characteristic related to the change of the data value of the attack message or communication timing; a communication pattern determination step which determines whether or not a message transmitted to the network fits the communication pattern identified in the communication pattern identification step; and a criterion message determination step which determines a criterion message to be used as a criterion to determine whether or not the message to be transmitted is an attack message, using the result of the determination in the communication pattern determination step.SELECTED DRAWING: Figure 14