![]() “Cocaine noodles: exploiting the gap between human and machine speech recognition.” In USENIX Workshop on Offensive Technologies(WOOT), Washington, D.C., Aug. By taking advantage of intermodulation distortion and amplitude modulation, our attack voice commands are inaudible and achieve high success rates on an Android phone more than three meters away and on an Amazon Echo device more than two meters away. Based on the inherent non-linear properties of microphones, we propose a novel attack method by transmitting well-design ultrasounds to control common voice assistants, like Siri, Google Now, and Alexa.
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