| 摘要 |
<p>A method to protect a relay attack in a smart key system of a vehicle is disclosed. More particularly, when an FOB key carried by a user receives a signal applied from a smart key unit installed in a vehicle and then transmits a response signal including at least two types of information to the smart key unit, a method to protect a relay attack in a smart key system of a vehicle accurately calculates the current distance between the smart key unit and the FOB key using RSSI and the current intensity of a voltage included in the response signal in a process of decoding the response signal, thereby operating the smart key system only in a state where the FOB key user secures a predetermined visible distance from the vehicle and preventing a third party from trespassing on the vehicle through RF bidirectional authentication.</p> |
