The invention discloses a relay attack defense method, a PEPS system and a vehicle, and the method comprises the following steps: a user touches or presses a trigger switch on a vehicle door handle to wake up an electronic control unit of the PEPS system; the electronic control unit drives at least three LF antennas to send LF wake-up signals of all channels, the LF wake-up signals of all the channels are sent according to a random sequence, and a FOB key feeds back a response signal RF21 after receiving the LF wake-up signals; the electronic control unit receives the response signal RF21 and sends an RF inquiry signal, the RF inquiry signal is loaded with encryption information and related information of each channel, the FOB key judges whether an encryption algorithm of the FOB key and a sending sequence of each channel are correct or not after receiving the RF inquiry signal, if the encryption algorithm and the sending sequence of each channel are correct, the FOB key feeds back a response signal RF22, and otherwise, the FOB key does not act; and if the electronic control unit receives the correctly encrypted response signal RF22, the FOB key is authorized to unlock the vehicle door, otherwise, the vehicle door is still locked. According to the invention, the malicious attack of the relay can be defended, and the security and anti-theft performance of the PEPS system can be improved.

    本发明公开一种防御中继攻击方法、PEPS系统及车辆,该方法包括以下步骤:用户触摸或者按压车辆门把手上的触发开关,唤醒PEPS系统的电子控制单元;电子控制单元驱动至少三个LF天线发送各通道的LF唤醒信号,各通道LF唤醒信号按随机顺序发送,FOB钥匙接收到LF唤醒信号后反馈应答信号RF21;电子控制单元接收到应答信号RF21,发送RF质询信号,RF质询信号加载有加密信息以及各通道的相关信息,FOB钥匙接收到RF质询信号后判断其加密算法和各通道的发送顺序是否正确,若正确则FOB钥匙反馈应答信号RF22,否则FOB钥匙不动作;电子控制单元接收到加密正确的应答信号RF22,则授权FOB钥匙,解锁车门,否则,车门仍然紧锁。本发明可防御中继的恶意攻击,提升PEPS系统的安全防盗性。


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    Title :

    Relay attack defense method, PEPS system and vehicle


    Additional title:

    一种防御中继攻击方法、PEPS系统及车辆


    Contributors:
    CAO XIAOCUI (author) / PIAO SHENGRAN (author) / WANG LEI (author)

    Publication date :

    2021-05-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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