|||||QNTAL - VIII-Nachtblume (2018)||]|
Researchers can now send secret audio instructions undetectable to the
human ear to Apple’s Siri, Amazon’s Alexa and Google’s Assistant.
A group of students from University of California, Berkeley, and Georgetown
University showed in 2016 that they could hide commands in white noise
played over loudspeakers and through YouTube videos to get smart devices
to turn on airplane mode or open a website.
This month, some of those Berkeley researchers published a research
paper that went further, saying they could embed commands directly into
recordings of music or spoken text. So while a human listener hears someone
talking or an orchestra playing, Amazon’s Echo speaker might hear an
instruction to add something to your shopping list.
“We wanted to see if we could make it even more stealthy,” said Nicholas
Carlini, a fifth-year Ph.D. student in computer security at U.C. Berkeley and
one of the paper’s authors.
Mr. Carlini added that while there was no evidence that these techniques
have left the lab, it may only be a matter of time before someone starts
exploiting them. “My assumption is that the malicious people already
employ people to do what I do,” he said.
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