A portable device includes a reception antenna and a strength meter. The reception antenna includes antennas of three axes each receiving a first signal and a second signal. The strength meter measures a reception strength of the request signal and the request signal received by each of the three axes of the LF receiver. A relay attack determination device is provided with a comparator that executes a comparative process of strength ratios of the request signal and the request signal based upon a measurement value of the reception strength. In a case where the three axes include an ineffective axis, in which the measurement value of the reception strength of the request signal or the request signal deviates from a usable range, the comparator excludes the ineffective axis and executes the comparative process.


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    Title :

    Relay attack determination device


    Contributors:
    MORI YUKI (author)

    Publication date :

    2023-07-18


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G07C TIME OR ATTENDANCE REGISTERS , Zeit- oder Anwesenheitskontrollgeräte



    Relay Attack Determination Device

    MORI YUKI | European Patent Office | 2022

    Free access

    RELAY ATTACK DETERMINATION DEVICE

    MORI YUKI | European Patent Office | 2021

    Free access

    RELAY ATTACK DETERMINATION DEVICE

    MORI YUUKI | European Patent Office | 2021

    Free access

    RELAY ATTACK DETERMINATION DEVICE

    MORI YUUKI | European Patent Office | 2021

    Free access

    RELAY ATTACK DETERMINATION DEVICE

    MORI YUKI | European Patent Office | 2021

    Free access