Hackers send silent commands to speech recognition systems with ultrasound

By Devin Coldewey

Security researchers in China have invented a clever way of activating voice recognition systems without speaking a word. By using high frequencies inaudible to humans but which register on electronic microphones, they were able to issue commands to every major “intelligent assistant” that were silent to every listener but the target device. Read More

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Source:: TechCrunch Gadgets