alt Hacker NewsWhich is why banning chinese routers and banning chinese cars than can be remotely disabled by the komrades makes sense.
Selling cars, worldwide, made sense when they weren't always connected to the mother land. Germans selling you a BMW in the 80s? You've got the key: you turn the key. They couldn't turn off all the BMWs if suddenly the US were to be at war with Germany again.
But this madness of cars receiving OTA updates and remote subscriptions and whatnots?
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If you bought a BMW in the 80s and you were suddenly at war with Germany, you'd be stuck scavenging for replacement parts the moment something in the engine failed. It's not as easy and direct, but the problem is still there.
Doing business with the enemy always comes with a risk. For countries that don't build their own networking equipment (including the PCBs and chips), you have to accept some level of risk or you have to avoid such technology all together.
The era of "smart cars" actually makes targeting much easier. You don't need to bulk disable cars in a country.
Imagine an enemy country using zero-days to track a military leader via their personal device(s), then disabling their smart civilian vehicle they use to commute to work. Final leg is they had previously parked drones along their expected commute routes for just such an occasion and..
edit: see interesting hypothetical future war series on YT, specifically this bit.. https://youtu.be/drr7mmibt9E?t=157