Black & White Path

May 6, 2026 · Information Security

23‑Year‑Old Hacks Taiwan High‑Speed Rail with SDR: TETRA Flaw Exposes 19‑Year Gap

A 23‑year‑old Taiwanese student used a low‑cost SDR and eleven handheld radios to clone unchanged TETRA parameters, trigger a General Alarm, and force four high‑speed trains to stop, exposing a 19‑year‑old key‑rotation flaw and highlighting broader risks in critical‑infrastructure radio security.