“Anyone equipped with roughly $100 worth of radio hardware can silently identify and re-identify the same vehicle repeatedly, building movement profiles without driver awareness or consent.”
Every car’s tire pressure sensors broadcast a unique ID in cleartext over radio. No encryption. No rotation. The ID never changes for the life of the tire. Researchers deployed $100 receivers along a road and captured six million transmissions from 20,000 vehicles over ten weeks. They could tell when people left for work, came home, and followed their daily routines. The signals reach 55 meters, even through walls. Current vehicle cybersecurity regulations do not address this at all. Your car has been broadcasting a tracking beacon since the day you drove it off the lot and nobody told you.