To provide an update management method for causing an external tool, capable of transmitting an update message to update data such as shared keys within ECUs making up an onboard network, to update shared keys and the like within the ECUs, while reducing the risk of all ECUs being unauthorizedly rewritten in a case where secret information given to the external tool is leaked.SOLUTION: An onboard network system 10 includes a master ECU that receives from an external tool 30 and verifies a public key certificate, update authority information indicating authority of the external tool. In a case that an update message instructing updating of shared keys or the like of one or multiple ECUs connected to a network has been transmitted from the external tool, if the verification of the update authority information is successful and the update authority information indicates that the transmission of the update message is within the range of authority of the external tool, the ECU transfers the update message to the network so that the ECUs update the shared keys or the like, and otherwise, the ECU does not transfer the update message in order to inhibit update by the ECUs.SELECTED DRAWING: Figure 1

    【課題】車載ネットワークを構成するECUの共有鍵等を更新する更新メッセージを送信する外部ツールに付与された機密情報が漏洩した場合に全てのECUが不正に書き換えられるリスクを低減して、外部ツールにECU内の共有鍵等を更新させる更新管理方法を提供する。【解決手段】車載ネットワークシステム10において、マスタECUは、外部ツール30から外部ツールの権限を示す更新権限情報である公開鍵証明書を受信して検証する。外部ツールから、ネットワークに接続される1つ又は複数のECUの共有鍵等の更新を指示する更新メッセージが送信された場合、更新権限情報の検証が成功し、かつ、更新メッセージの送信が外部ツールの権限範囲内であることを更新権限情報が示すときには、ECUで共有鍵等の更新を行うように更新メッセージをネットワークに転送する。それ以外のときにはECUによる更新を抑止するために更新メッセージの転送を行わない。【選択図】図1


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    Title :

    UPDATE MANAGEMENT METHOD, UPDATE MANAGEMENT DEVICE, AND CONTROL PROGRAM


    Additional title:

    更新管理方法、更新管理装置及び制御プログラム


    Contributors:
    HAGA TOMOYUKI (author) / MATSUSHIMA HIDEKI (author) / MAEDA MANABU (author) / KAIJO YUJI (author) / ANZAI JUN (author)

    Publication date :

    2020-03-26


    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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