The disclosure provides relay attack mitigation and prevention. This disclosure describes systems, methods, and devices related to enhanced time of flight (ToF) calculation using phase measurements. A device may identify a radiofrequency (RF) signal received from a vehicle key, wherein the RF signal comprises a command associated with a vehicle. The device may select a first subset of a frequency bandwidth. The device may perform a first time-of-flight calculation associated with the RF signal using a phase shift measurement on a first subset of frequency bandwidth. The device may determine a distance between the vehicle key and the vehicle based on the first time-of-flight calculation. The device may compare the distance to a predetermined threshold. The device may determine a status of the RF signal based on the comparison.

    本公开提供了“中继攻击减轻和预防”。本公开描述了与使用相位测量的增强的飞行时间(ToF)计算相关的系统、方法和装置。一种装置可识别从车辆钥匙接收的射频(RF)信号,其中所述RF信号包括与车辆相关联的命令。所述装置可以选择频率带宽的第一子集。所述装置可以使用对频率带宽的第一子集的相移测量来执行与RF信号相关联的第一飞行时间计算。所述装置可以基于所述第一飞行时间计算来确定所述车辆钥匙与所述车辆之间的距离。所述装置可以将所述距离与预定阈值进行比较。所述装置可以基于所述比较来确定所述RF信号的状态。


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    Title :

    Relay attack mitigation and prevention


    Additional title:

    中继攻击减轻和预防


    Contributors:

    Publication date :

    2021-07-27


    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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