Does anyone know anyone who has had their 4 stolen?
Not a 4, but a resident near me had a car with keyless nicked and there was talk of "should have used a Faraday box".
Do they really work and if so, which would you buy?
From another forum: -
“
There are three different attack approaches being used and all the EGMP based cars (Ioniq5/6, Kia EV6 and Genesis GV60) are currently susceptible to all three approaches.
Relay Attack
The common relay attack (which is widely publicised). One device takes the signal from your key fob amplifies it and send it to another close to your car. The car simply sees the correct expected signal and opens and starts.
This can me mitigated by keeping your keys in a container that does not allow wireless signals to leak out - a Faraday box.
Key Cloning
This approach requires access to your key to simply make a digital copy, which for all intents and purposes is then identical to the original.
Careful who you give your key to.
Key Emulator
A device is placed close to the car to receive the car's signal. The device then takes between 10 and 120 second approximately to find the correct signal to unlock the car and this can then be saved for later use.
A secondary authentication system is needed to prevent the car from starting, but if this is hooked into Bluelink that can be disabled once access to the car has been gained. There's not much apart form physical krooklock type approach that can help here.”
Yep you need a faraday pouch (prevents signal transmission) but you ALSO need to address keyless entry signal polling from the VEHICLE - number of ways to deal with this - cheapest and easiest is to turn off keyless entry.
Hope that helps!!