To accurately detect unauthorized communication by a non-genuine communication device.SOLUTION: An ECU (10) transmits data information (15) including data and a checksum obtained by calculating the data according to a predetermined calculation rule to a communication line (L). The ECU (10) includes a port (11) connected to the communication line (L) and a calculation unit (12) connected to the port (11). The calculation unit (12) compares the signal level of transmission data information Tx transmitted by the ECU (10) to the communication line (L) via the port (11) and the signal level of communication line data information Rx in the communication line (L). When the signal levels do not match, the checksum included in the communication line data information Rx is used to determine the presence or absence of unauthorized communication.SELECTED DRAWING: Figure 1

    【課題】非正規の通信装置による不正通信を精度良く検出する。【解決手段】ECU(10)は、データとデータを予め定められた演算規則に従って演算して得られるチェックサムとが含まれるデータ情報(15)を通信線(L)に送信する。ECU(10)は、通信線(L)に接続されるポート(11)と、ポート(11)に接続される演算部(12)とを備える。演算部(12)は、ECU(10)がポート(11)を介して通信線(L)に送信した送信データ情報Txの信号レベルと通信線(L)における通信線データ情報Rxの信号レベルとを比較し、両者が一致しない場合に通信線データ情報Rxに含まれるチェックサムを用いて不正通信の有無を判定する。【選択図】図1


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    Title :

    COMMUNICATION DEVICE, COMMUNICATION ABNORMALITY DETERMINATION METHOD PERFORMED BY COMMUNICATION DEVICE, AND PROGRAM FOR CONTROLLING COMMUNICATION DEVICE


    Additional title:

    通信装置、通信装置が行なう通信異常判定方法、および通信装置を制御するためのプログラム


    Contributors:

    Publication date :

    2022-06-09


    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




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