Longtime Slashdot reader linuxwrangler writes: Dark Reading reports that a team of researchers has determined that signals from tire pressure monitoring systems (TPMSs), required in U.S. cars since 2007, can be used to track the presence, type, weight, and driving pattern of vehicles. The researchers report (PDF) that the TPMS data, which includes unique sensor IDs, is sent in clear text without authentication and can be intercepted 40-50 meters from a vehicle using devices costing $100. "Researchers have discovered that most TPMS sensors transmit a unique identifier in clear text that never changes during the lifetime of the tire," the researchers pointed out. "This unencrypted wireless com...