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You could always use a club: http://www.amazon.com/Club-1000-Original-Steering-Wheel/dp/B...

But anyone waiting to spend 30 minutes with an electronic crack is also smart enough to use liquid nitrogen to crack this too.

The difference is that a keyless hack can look natural since there is no physical force for entry or ignition. A funnel and chisel would raise some eyebrows.

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This attack is against the RFID immobilizer for the engine, which means an attacker would have to break into the car, break the steering wheel lock and break the physical ignition lock prior to starting the car.

The full paper here: https://www.usenix.org/sites/default/files/sec15_supplement.... has a lot better detail.

No, it's also an attack on the actual wireless key which is used to open and start the car. It's just making the car "think" that the key is inside, so you just press the Start button and the car starts, after which you drive it away like normal.

Fair, but only on cars which have only passive security (that is - where you don't need to use the fob to unlock the car and you don't need to use a physical key to turn the ignition).

Which is of course the stock configuration on most modern luxury vehicles.

Most new cars which have keyless systems work exactly like that, nothing to do with luxury cars.

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