Ultrasonic frequencies can be used to visit hacking websites, unlock smart doors.
Hacks are often caused by our own stupidity, but you can blame tech companies for a new vulnerability. Researchers from China’s Zheijiang University found a way to attack Siri, Alexa and other voice assistants by feeding them commands in ultrasonic frequencies. Those are too high for humans to hear, but they’re perfectly audible to the microphones on your devices. With the technique, researchers could get the AI assistants to open malicious websites and even your door if you had a smart lock connected.
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