Ge0rge:Eva888: I believe there are faraday type covers to keep such keys in. Was mulling over whether this was necessary.
I'm not sure I understand what the use case would be for putting the fob in a cage - unless you're worried about non-ionising radiation in your pocket / bag.
Blocking the signals from the fob won't stop your car being unlocked by someone else with their fob, if indeed that gaping security hole exists.
Repeater attacks from people outside your house with a big-ass antenna are a thing. Particularly with keyless start high value cars as they will keep running once started even if the key is out of range.
Its a real bad idea IMO since I know of people where hubby and wife drove somewhere, dropped off the husband, went to the mall, parked. Got out, car locked. Didn't have the key because its at home and it used the husbands one to run.
Another has an internal garage and they have to leave the key inside the bedroom because if its in their pocket when they walk about the house it will unlock the car often.



