> last time I heard about something like this, it was because the guy's car was parked 5 stories underground, and didn't carry his car keys, because he was using his phone to unlock all the time
I hope you aren't suggesting that set of details makes this okay. I should be able to park in a faraday cage 2 miles underground and still start it the same as I can on the surface. Including with my phone, if it's equipped with phone-as-key.
The phone-as-key shouldn't only work when online and shouldn't require the car to be online, either. And this is a problem trivially solved with proper use of cryptography.
The reason for this is that if the car gives people the ability to start a trip with a phone, it's dangerous to assume they'll always carry a keyfob as a backup. Just like I don't carry two car keys.
I hope you aren't suggesting that set of details makes this okay. I should be able to park in a faraday cage 2 miles underground and still start it the same as I can on the surface. Including with my phone, if it's equipped with phone-as-key.
The phone-as-key shouldn't only work when online and shouldn't require the car to be online, either. And this is a problem trivially solved with proper use of cryptography.
The reason for this is that if the car gives people the ability to start a trip with a phone, it's dangerous to assume they'll always carry a keyfob as a backup. Just like I don't carry two car keys.