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Why don't cars use public key crypto? Is it too expensive to run on a key?
by joelthelion 1y ago
Why don't cars use public key crypto? Is it too expensive to run on a key?
- Hamuko 1y agoProbably power-wise, yeah. Most keys only have little coin batteries and people want those to last for years. I have a "smart" BMW car key and it inhales the battery. I don't think it can go more than a couple of weeks without having to be charged.
- anticrymactic 1y agoCould charging in the ignition be good enough to keep it full? Or a secondary dock at home? I don't really like the idea of short term key batteries, but it sounds like bmw can improve the current system a lot.
- Hamuko 1y agoThere's no ignition in BMWs anymore. Even if you don't go for the full keyless package, the start is still keyless. You just pay extra to have the doors be keyless too.