4 ms·
Apple Watches can be used to unlock MacBooks and are immune to relay attacks like these because the laptop only accepts signals with a small enough roundtrip la
by ladberg 7y ago
Apple Watches can be used to unlock MacBooks and are immune to relay attacks like these because the laptop only accepts signals with a small enough roundtrip latency. Due to the speed of light, it's impossible to unlock it from farther than a few feet away, even with a relay. Why don't key fobs do the same thing? It must take more expensive radios/hardware, but I feel like it would be worth it for a car like a Tesla.
- pushpop 7y agoIt’s worth it for any car when you think about how much more expensive they are than a laptop.
- ralfd 7y agoIt is comfortable though to lock/unlock a car from a few meters away.
- unityByFreedom 7y agoIs it necessary to start it from far away?
- yellow_postit 7y agoremote start has long been a nice comfort feature for cars especially in cold regions/weather so the car can start warming up before you get to it.
- reallydontask 7y agoSame applies to hot regions/weather and cooling down the car's interior. Not fun getting into a car that's been in the sun most of the day when the temperature is 40°C
- labawi 7y agoReasonable, though the engine on Tesla has no relation to heating.
- 2rsf 7y agoThat, many many years ago I have learned that roundtrip latency should always be measured in this kind of technology, AFAIK since it is mostly measured in the car then battery life and a bit more expensive hardware is not a big deal (apparently not)
- panpanna 7y agoI don't think so. Amplification attacks with the right hardware adds only a negligible delay. At the same time the protocol is not constant time, requiring some margin. The main difference to Tesla hack is that you don't keep your MacBook outside the house at nights. And thief's don't need to unlock it to steal it, they just take it and leave.
- new_realist 7y agoThe BMW i3 is known to be immune to amplification attacks, so it can be done.