How do u protect car fob?
I think it is a mildly weird question, but this also may be the right place to ask this. Wife's new car has a fob and, well, it is convenient, but I also saw stories about guys getting close enough to garage and somehow taking off with the car anyway despite fob seemingly staying with owners. I am assuming fobs are just being copied over the air somehow, but I never really looked into it that closely.
Is there a way to prevent that? Are there steps you can take?
From the attacks I know about, they work by jamming the fob signal so the attacker can record it, but the car doesn't receive it. They need a couple of attempts from your fob for the scheme to work. If you (or your wife) ever tries to unlock the car and you have to press the fob multiple times, when you get into the car, press lock and then unlock on your fob. This should make your unlock command the latest in the car's memory, invalidating any captured by someone else. You can also do it each time you exit your car: lock, unlock, lock. The main thing is for the lock, unlock, lock sequence to happen when you're too close to the car for anyone else to jam your signal.
Would putting the car fob in a faraday bag help?