A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
To prevent erroneous determination on a relay attack.SOLUTION: An on-vehicle machine 1 comprises a LF transmission unit 13 for making first request signals S1a, S1b be transmitted from transmission antennas 7a, 7b, respectively and making second request signals S2a, S2b be transmitted from the transmission antennas 7a, 7b, simultaneously. A portable machine 3 comprises a LF reception unit 37 for receiving the first request signals S1a, S1b and the second request signals S2a, S2b from the on-vehicle machine 1 by using reception antennas 32a, 32b, 32c. The portable machine 3 comprises a control unit 40 for determining a relay attack on a vehicle on the basis of strength ratios of respective axes of a magnetic field of each of the first request signals S1a, S1b and strength ratios of respective axes of a synthesized magnetic field of each of the second request signals S2a, S2b.SELECTED DRAWING: Figure 1
【課題】リレーアタックの誤判定を防止する。【解決手段】車載機１は、送信アンテナ７ａ、７ｂからそれぞれ第１のリクエスト信号Ｓ１ａ、Ｓ１ｂを送信すると共に、送信アンテナ７ａ、７ｂから同時に第２のリクエスト信号Ｓ２ａ、Ｓ２ｂを送信させるＬＦ送信部１３を備え、携帯機３は、受信アンテナ３２ａ、３２ｂ、３２ｃによって車載機１から第１のリクエスト信号Ｓ１ａ、Ｓ１ｂおよび第２のリクエスト信号Ｓ２ａ、Ｓ２ｂを受信するＬＦ受信部３７と、を備える。携帯機３は、第１のリクエスト信号Ｓ１ａ、Ｓ１ｂのそれぞれの磁界の各軸の強度比と、第２のリクエスト信号Ｓ２ａ、Ｓ２ｂの合成磁界の各軸の強度比に基づいて、車両に対するリレーアタックを判定する制御部４０を備える。【選択図】図１
To prevent erroneous determination on a relay attack.SOLUTION: An on-vehicle machine 1 comprises a LF transmission unit 13 for making first request signals S1a, S1b be transmitted from transmission antennas 7a, 7b, respectively and making second request signals S2a, S2b be transmitted from the transmission antennas 7a, 7b, simultaneously. A portable machine 3 comprises a LF reception unit 37 for receiving the first request signals S1a, S1b and the second request signals S2a, S2b from the on-vehicle machine 1 by using reception antennas 32a, 32b, 32c. The portable machine 3 comprises a control unit 40 for determining a relay attack on a vehicle on the basis of strength ratios of respective axes of a magnetic field of each of the first request signals S1a, S1b and strength ratios of respective axes of a synthesized magnetic field of each of the second request signals S2a, S2b.SELECTED DRAWING: Figure 1
【課題】リレーアタックの誤判定を防止する。【解決手段】車載機１は、送信アンテナ７ａ、７ｂからそれぞれ第１のリクエスト信号Ｓ１ａ、Ｓ１ｂを送信すると共に、送信アンテナ７ａ、７ｂから同時に第２のリクエスト信号Ｓ２ａ、Ｓ２ｂを送信させるＬＦ送信部１３を備え、携帯機３は、受信アンテナ３２ａ、３２ｂ、３２ｃによって車載機１から第１のリクエスト信号Ｓ１ａ、Ｓ１ｂおよび第２のリクエスト信号Ｓ２ａ、Ｓ２ｂを受信するＬＦ受信部３７と、を備える。携帯機３は、第１のリクエスト信号Ｓ１ａ、Ｓ１ｂのそれぞれの磁界の各軸の強度比と、第２のリクエスト信号Ｓ２ａ、Ｓ２ｂの合成磁界の各軸の強度比に基づいて、車両に対するリレーアタックを判定する制御部４０を備える。【選択図】図１
KEYLESS ENTRY SYSTEM
キーレスエントリーシステム
MORI YUKI (author)
2019-03-22
Patent
Electronic Resource
Japanese