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Because a GPS signal gives coordinates to your navigation screen.

Your radio has 0 control over an Engine. Or at least, shouldn't.

Source: Connected Car is my day job.

You’re completely wrong.

First of all, many manufacturers market remote engine kill as a subscription service.

Second, many cars use CAN busses and connect the radio to it. That makes it very easy for the radio to interfere with crucial functions, like braking.

The CAN bus uses realtime time multiplexing for congestion control, so it is very easy to target traffic from a particular device subsystem, even accidentally.

Sources: search for “can bus vulnerabilities”. Also, a ~2012 GMC I used to own had a bug in the radio firmware that caused the ABS system to stay on when the engine was off, which ran down the battery overnight.

On my current Dodge, there is a recall where the head unit firmware leads to confusing semantics around “park” on the transmission, and a separate firmware update where it refuses to disengage cruise control.

On recent Ford mustangs, the radio can display all sorts of engine statistics, and tune the engine in real time.

European luxury cars are even more integrated on this front, and have sport modes where the radio changes the response curves for the engine, steering, transmission and suspension.

The first generation Prius had the engine control computer physically inside the radio.

That covers the major car manufacturers across three continents.

> and a separate firmware update where it refuses to disengage cruise control.

Wow, that's a bad one.

> subscription service.

Oh, subscription service.

Not GPS signal.

I'm completely right.

This isn't about GPS navigation systems in your in-dash screen. This is about hacking into a service linked to a device specifically designed to do what he did with it.

From the article:

>The hacker, who goes by the name L&M, told Motherboard he hacked into more than 7,000 iTrack accounts and more than 20,000 ProTrack accounts, two apps that companies use to monitor and manage fleets of vehicles through GPS tracking devices. The hacker was able to track vehicles in a handful of countries around the world, including South Africa, Morocco, India, and the Philippines. On some cars, the software has the capability of remotely turning off the engines of vehicles that are stopped or are traveling 12 miles per hour or slower, according to the manufacturer of certain GPS tracking devices.

Must we use that many ecus? They are horrifically expensive - why not auosar separated squeeze them all together and we hope that row hammer never existed.

That's what the industry is moving towards. Fewer but higher powered ECUs running either with a SOC that provides isolation of the cores in hardware or a hypervisor to enable running safety critical applications in isolation.

That is what worked so swell for branch prediction.

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