Ultrasonic waves don’t make a sound, but they can still activate Siri on your cellphone and have it make calls, take images or read the contents of a text to a stranger. All without the phone owner’s knowledge. Ning Zhang, assistant professor of computer science and engineering at the McKelvey School of Engineering Attacks on cell phones aren’t new, and researchers have previously shown that ultrasonic waves can be used to deliver a single command … More
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