3 ms·
> What you actually need to do to defeat this is a bit more expensive. You need the token (keyfob, card, etcetera) to be smart enough to use the tiny surge of p
by dmurray 7y ago
> What you actually need to do to defeat this is a bit more expensive. You need the token (keyfob, card, etcetera) to be smart enough to use the tiny surge of power to do local computation, and then produce one-time-only access codes.
Why do you need the keyfob to rely on a "surge of power"? Can't you put a battery in it and charge that battery when driving? If the battery runs down, you needed a backup anyway (physical key or phone app) in every implementation I've seen.
- beatgammit 7y agoWhy couldn't it work like credit cards? Physically touch the car with the key like a normal key hole if the battery dies. The car can provide whatever small current it needs, and the key can be as complex as we want.