At this point, it seems like every so-called consumer smart device—from routers and baby monitors to connected thermostats and garage door openers—has been shown to have vulnerabilities. But that same security crisis has also played out on a macro scale, exposing municipal works and public safety sensors to manipulation that could destabilize traffic lights, undermine radiation sensors, or even create a calamity like causing a dam to overflow because of tainted water level data.

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