To determine whether or not each message sent out onto an on-vehicle network is an attack message.SOLUTION: In a method for detecting unauthorized communication in an on-vehicle network system, information relating to an attack message and information relating to a gray message among messages that are sent out onto the network are saved in a storage unit; a communication pattern is identified by obtaining, as the communication pattern, a model that is obtained by executing statistical processing on information relating to the attack message and information relating to the gray message; a prediction value of a data value included in a message to be received next is calculated using the communication pattern; and it is determined whether or not the message conforms to the communication pattern. Attack message determination and communication pattern conforming determination are executed on each message received from the network. In the attack message determination executed on a message received after execution of the communication pattern conforming determination, results of the communication pattern conforming determination that has already been executed are used.SELECTED DRAWING: Figure 10

    【課題】車載ネットワークに送出された個々のメッセージについて攻撃メッセージか否かを判定する。【解決手段】車載ネットワークシステムにおける不正通信の検知方法では、ネットワークに送出されたメッセージのうち、攻撃メッセージに関する情報及びグレーメッセージに関する情報を記憶部に保存し、攻撃メッセージに関する情報及びグレーメッセージに関する情報から統計学的処理を実行して得られるモデルを通信パターンとして取得することで通信パターンを識別し、通信パターンを用いて、次に受信されるメッセージに含まれるデータ値の予測値を算出し、メッセージが通信パターンに適合するか否かを判定し、攻撃メッセージ判定及び通信パターン適合判定は、ネットワークから受信された各メッセージに対して実行され、通信パターン適合判定後に受信されたメッセージに対する攻撃メッセージ判定では、実行済みの通信パターン適合の判定の結果を用いる。【選択図】図10


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    Title :

    METHOD FOR DETECTING UNAUTHORIZED COMMUNICATION, SYSTEM FOR DETECTING UNAUTHORIZED COMMUNICATION, AND PROGRAM


    Additional title:

    不正通信検知方法、不正通信検知システム及びプログラム


    Contributors:

    Publication date :

    2019-05-30


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H04L TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION , Übertragung digitaler Information, z.B. Telegrafieverkehr / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G06F ELECTRIC DIGITAL DATA PROCESSING , Elektrische digitale Datenverarbeitung



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