PROBLEM TO BE SOLVED: To provide keyless entry device capable of clearly determining whether or not relay attack is performed with a simple configuration.SOLUTION: A keyless entry device 100 includes a vehicle side device 10 transmitting a request signal, and a portable machine 20 receiving the request signal and transmitting an answer signal in correspondence with the request signal. A portable machine side receiving section 22 receives a communication signal including the request signal or a fraud signal having a frequency same with that of the request signal, a portable machine control section 25 detects receiving intensity of a fundamental wave of the received communication signal and receiving intensity of a harmonic of the communication signal, and the answer signal including information based on the receiving intensity of the fundamental wave and the receiving intensity of the harmonic is generated, and is transmitted from a portable machine transmitting section 21. A vehicle side control section 15 determines whether the answer signal is a signal through a fraud relay machine or a regular signal not through the relay machine on the basis of the information on the receiving intensity of the fundamental wave and the receiving intensity of the harmonic.SELECTED DRAWING: Figure 2
【課題】簡易な構成でリレーアタックが行なわれたかどうかを明確に判定することのできるキーレスエントリー装置を提供する。【解決手段】リクエスト信号を送信する車両側装置10と、リクエスト信号を受信し、リクエスト信号に対応したアンサー信号を送信する携帯機20と、を備えたキーレスエントリー装置100であって、携帯機側受信部22は、リクエスト信号又はリクエスト信号と同一の周波数を有する不正信号を含む通信信号を受信し、携帯機制御部25は、受信した通信信号の基本波の受信強度と通信信号の高調波の受信強度とを検出し、基本波の受信強度と高調波の受信強度に基づいた情報を含むアンサー信号を作成すると共に携帯機送信部21より送信させ、車両側制御部15は、基本波の受信強度と高調波の受信強度とに関する情報に基づいて、アンサー信号が不正な中継機を介した信号か中継機を介さない正規の信号かを判定する。【選択図】図2
KEYLESS ENTRY DEVICE
キーレスエントリー装置
2016-06-30
Patent
Electronic Resource
Japanese
IPC: | E05B LOCKS , Schlösser / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / H04B TRANSMISSION , Übertragung / H04Q Wähltechnik , SELECTING / H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze |
Keyless entry control system, keyless entry method and keyless entry device for vehicle
European Patent Office | 2023
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