To provide a fraud handling method capable of taking appropriate action against transmission of illegal frames by increasing resistance to brute-force attacks on MAC in an in-vehicle network system that communicates according to CAN protocol, or the like.SOLUTION: The fraud handling method is used in an in-vehicle network system that includes multiple electronic control units sending and receiving data frames with MAC added in the in-vehicle network. The method includes: a receiving step to receive the data frame sent to the in-vehicle network (sequence S4004); a verification step to verify that the MAC is added to the data frame received in the receiving step by generating the MAC using data (sequence S4005); and an update processing step of performing update processing on the data used for MAC generation when the verification in the verification step fails (sequence S4007, etc.)SELECTED DRAWING: Figure 43

    【課題】CANプロトコル等に従って通信する車載ネットワークシステムにおいて、MACに対する総当たり攻撃への耐性を高め、不正なフレームの送信に対して適切に対処する不正対処方法を提供する。【解決手段】車載ネットワークにおいてMACが付加されたデータフレームの授受を行う複数の電子制御ユニットを備える車載ネットワークシステムにおいて用いられる不正対処方法は、車載ネットワークに送信されたデータフレームを受信する受信ステップ(シーケンスS4004)と、データを利用してMACを生成して、受信ステップで受信されたデータフレームに当該MACが付加されていることを検証する検証ステップ(シーケンスS4005)と、検証ステップでの検証が失敗した場合に、MACの生成に利用されるデータについての更新処理を行う更新処理ステップ(シーケンスS4007等)とを含む。【選択図】図43


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    Title :

    FRAUD HANDLING METHOD AND ELECTRONIC CONTROL UNIT


    Additional title:

    不正対処方法、および電子制御ユニット


    Contributors:

    Publication date :

    2021-08-19


    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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