Technology

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For at least a decade, a car theft trick known as a “relay attack” has been the modern equivalent of hot-wiring: a cheap and relatively easy technique to steal hundreds of models of vehicles.

But when one group of Chinese researchers actually checked whether it's still possible to perform relay attacks against the latest Tesla and a collection of other cars that support that next-gen radio protocol, they found that they're as stealable as ever.

In a video shared with WIRED, researchers at the Beijing-based automotive cybersecurity firm GoGoByte demonstrated that they could carry out a relay attack against the latest Tesla Model 3 despite its upgrade to an ultra-wideband keyless entry system, instantly unlocking it with less than a hundred dollars worth of radio equipment.

Instead, a hacker's device near the car has, in fact, relayed the signal from the owner's real key, which might be dozens or hundreds of feet away.

Or, as GoGoByte researcher Yuqiao Yang describes, the trick could even be carried out by the person behind you in line at a café where your car is parked outside.

“That's how fast it can happen, maybe just a couple seconds.” The attacks have become common enough that some car owners have taken to keeping their keys in Faraday bags that block radio signals—or in the freezer.

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