Cyber Sirens: Heed the Warnings Before it is too Late

Photo: Yuri Samoilov At 11:48pm on April 7, 2017, every tornado siren in Dallas went off at the same time.  The sky was clear, but the shrieks from 156 sirens wrenched residents from their slumber. As the sirens blared on for 95 minutes, terrified callers flooded 911 phone lines, leaving people experiencing real emergencies waiting for someone to respond. The city was forced to shut down the entire emergency alarm system for days. What happened? What left city officials scrambling and Dallas citizens tired and bewildered? Hackers. A hacker managed to determine the radio code used to turn on...

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