Author: Justin Pot / Source: howtogeek.com

Your smart speaker can hear sounds that humans can’t, meaning attackers could hypothetically trigger a command without you noticing. It’s happening in labs right now.
Here’s Craig S. Smith, writing for the New York Times:
Over the last two years, researchers in China and the United States have begun demonstrating that they can send hidden commands that are undetectable to the human ear to Apple’s Siri, Amazon’s Alexa and Google’s Assistant.
Inside university labs, the researchers have been able to secretly activate the artificial intelligence systems on smartphones…
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