Student hacked Taiwan high-speed rail to trigger emergency brakes

A 23-year-old student in Taiwan used SDR equipment and handheld radios to intercept TETRA radio parameters and impersonate legitimate beacons, sending a high-priority alarm that triggered emergency braking on four Taiwan High Speed Rail trains for 48 minutes; authorities traced the transmissions, seized radios, an SDR and a laptop, and arrested the suspect (and an accomplice), highlighting long-standing operational security weaknesses (unchanged radio parameters) in a critical national transport system.