PROBLEM TO BE SOLVED: To enhance security performance, by preventing a relay attack, by including a signal of modulating a request signal, and also switching modulation of the request signal by at least one time.SOLUTION: A key entry device comprises a vehicle side device having a vehicle side transmission part provided in a vehicle and transmitting a request signal and a vehicle side receiving part for receiving an answer signal and a portable machine having a portable machine receiving part for receiving the request signal and a portable machine transmission part for transmitting the answer signal in response to the request signal, and the vehicle side device comprises at least one modulation means for modulating the request signal, and the portable machine comprises at least one demodulation means for demodulating the request signal in response to the respective modulation means, and the request signal includes a signal modulated by the modulation means, and modulation of the request signal is switched in at least one timing.SELECTED DRAWING: Figure 1
【課題】リクエスト信号が変調された信号を含み、かつ、リクエスト信号の変調を少なくとも1回切り替えることにより、リレーアタックを防止し、セキュリティ性能を高める。【解決手段】車両に設けられ、リクエスト信号を送信する車両側送信部、及び、アンサー信号を受信する車両側受信部を備えた車両側装置と、リクエスト信号を受信する携帯機受信部、及び、リクエスト信号に対応してアンサー信号を送信する携帯機送信部を備えた携帯機と、を備え、車両側装置は、リクエスト信号を変調する少なくとも1つの変調手段を有し、携帯機は、変調手段のそれぞれに対応してリクエスト信号を復調する、少なくとも1つの復調手段を有し、リクエスト信号は、変調手段によって変調された信号を含み、リクエスト信号の変調は、少なくとも1つのタイミングで切り替えられる。【選択図】図1
KEYLESS ENTRY DEVICE
キーレスエントリー装置
2016-11-04
Patent
Electronic Resource
Japanese
Keyless entry control system, keyless entry method and keyless entry device for vehicle
European Patent Office | 2023
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