To restrict a power consumption when communicating with an electronic key while restricting a relay attack.SOLUTION: An ECU 20 as an authentication device comprises a UWB communication part 26 loaded on a vehicle 12 and communicating wirelessly between an electronic key 14 and a UWB, an LF transmission part 22 loaded on the vehicle 12 in multiple and communicating wirelessly between the electronic key 14 and an LF band, a calculation part calculating a distance and an angle at which the electronic key 14 is situated relative to the UWB communication part 26 on the basis of a wireless communication with the electronic key 14 at the UWB communication part 26, an execution part executing a wireless communication with the electronic key 14 at the LF transmission part 22 corresponding to the calculated angle among the plurality of LF transmission parts 22 and a determination part deciding whether the electronic key 14 is present or not in the area corresponding to the LF transmission part 22 in which the wireless communication is executed on the basis of the executed wireless communication of the LF band and the calculated distance.SELECTED DRAWING: Figure 1

    【課題】リレーアタックを抑制すると共に、電子キーとの通信時における電力の消費を抑制する。【解決手段】認証装置としてのECU20は、車両12に搭載され、電子キー14とUWBの無線通信を行うUWB通信部26と、車両12に複数搭載され、電子キー14とLF帯の無線通信を行うLF送信部22と、UWB通信部26における電子キー14との無線通信に基づいて、電子キー14がUWB通信部26に対して位置する距離及び角度を算出する算出部と、複数のLF送信部22のうち算出された角度に対応するLF送信部22において、電子キー14との無線通信を実行させる実行部と、実行されるLF帯の無線通信及び算出された距離に基づいて、無線通信が実行されるLF送信部22に対応するエリアに電子キー14が存在するかを判定する判定部と、を備えている。【選択図】図1


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    Title :

    AUTHENTICATION DEVICE, VEHICLE, AUTHENTICATION METHOD, AND AUTHENTICATION PROGRAM


    Additional title:

    認証装置、車両、認証方法及び認証プログラム


    Contributors:

    Publication date :

    2022-09-22


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    E05B LOCKS , Schlösser / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G01S RADIO DIRECTION-FINDING , Funkpeilung / H04Q Wähltechnik , SELECTING



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