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发表于 2011-2-2 10:40:40
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it is actually very easy, especially for those keys with proximity sensor.
take two RF transmitters, transmitter A and transmitter B.
take transmitter A close to the person holding the real key. now, transmitter A will pick up the RF transmission from the key. transmitter A will then send that information to transmitter B, which is close to the car.
transmitter B will then transmits that information to the car - to the car, it appears that the real key is near by and it will allow you to unlock the door and start the car.
all it takes are two dumb transmitters to essentially bring the key to the car. |
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