Standard kit now is you get an RF extender that bridges the distance from a key inside someone’s house to the car; then the car just lets you open it and drive it away. Much faster and simpler than the old slim Jim ways!
Car: "please respond to challenge blah" Key: ENC(car-public-key, SIGN(blah)) Car: "too slow"
Physics itself limits how quickly you can do a round-trip to a device that's a certain distance away. If the timeout for the operation is set near enough to those physical limits, a relay attack won't work.
(the attacker's parts don't need to be high delay themselves, could be a pair of gain antennas and amplifiers.)
Keyless entry + keyless start means your vehicle could be gone before you've even got your shoes off after you get home.
Annoying though, I've really enjoyed not having to dig through pockets to open the car :(
I know that NFC itself does not require an internet connection, but the whole point of requiring a smartphone at all here is to have an app that millions of people MUST install, to collect data to sell. I won’t at all be surprised when they arbitrarily lock NFC keyless behind a required internet connection.
I’m tired boss.
The dashboard will immediately warn you that a key is not present (audio and visual icons), but both cars will not do anything to immobilize the car after the key has been left.
The device is actually two sets of equipment. When the unsuspecting victim parks and locks the car, a thief standing not far away holds the first device, which is used to pick up and amplify the electronic signal as it is sent between the car and the key fob.
That signal is relayed to a second device, which tricks the car into thinking that the key fob is near the car. That disarms the security system, unlocks the door and authenticates the engine to start.
https://www.latimes.com/business/la-fi-hy-mystery-car-steali...
once it’s started and in drive the key isn’t needed.
If you start a car, and then take the key out of the vehicle, you will get a message like this: https://i.ytimg.com/vi/Jo6gzVfAElc/maxresdefault.jpg
You will be able to drive the vehicle until it is put into park or shut off, and you won't be able to drive it again until the key is present again.
This has stranded some people who have done the following:
* start the car
* get out for some reason
* leave the key by accident
* get back in the car and drive away
* park at their destination
* they are now stranded without a key
My 1996 Mustang had a bad battery, so it would barely start. I took the remote fob off the key ring and left the car running, but locked it (using the physical door-lock button). When I came back later, the fob would not open the door.
WTF? Had to have another key brought from home.
Another good one: If you open the back door of a Mini Clubman (or the regular Cooper, most likely) and then accidentally drop your fob into the car and close the rear doors or hatch... the car will re-lock itself and you're fucked. This is great when it's a hot day and you just put a dog in the car, which is in the sun. Now you get to break a window. Yay German engineering.
At least in the two Hyundai's I've owned with this type of system - an Ioniq hybrid and a Kona EV - it drives just fine once started even if you chuck the key out the window.
This was surprising to me. In a previous car, I had a remote start that would specifically kill the engine if you pressed the brake without the key in the right position. So the stopping the engine was something that I just assumed would happen as well. Unless there's a concern about just having the engine stop while actively being driven???
The majority of cars depend on the engine to provide power assist on the brakes and steering. Without power assist the physical effort required to stop and steer goes up significantly. Suddenly having the control dynamics of a multi-ton chunk of metal change dramatically while at speed isn't something most people are capable of responding to correctly. Having the engine stop in the middle of a busy intersection is another way to have a bad time.
> I had a remote start that would specifically kill the engine if you pressed the brake without the key in the right position.
Being able to start the car remotely and being able to put the car in gear and drive without the key in the ignition are independent features.
It'll keep running. Can you imagine if it stops detecting the keys because the coin-battery is dead and the car all of the sudden stalls?
Only when you stop the car and then try to start it you'll notice.