Couldn't you just get the key fob signal first, buffer it in the radio near the car, then initiate the negotiation with the car, and finally replay the unlock s

Couldn't you just get the key fob signal first, buffer it in the radio near the car, then initiate the negotiation with the car, and finally replay the unlock signal for the car? The key fob can't invalidate signals with the car once it's sent since it's too far away, so even if you have distance-bounding on the key fob, it can't tell the car to ignore an otherwise valid signal.