It’s still a mystery to researchers at the University of Michigan and The University of Electro-Communications (Tokyo) – just what physically enabled them to inject commands into the embedded microphones of Amazon Alexa, Google Home, and other digital voice assistant devices via laser pointers. The team in 2019 used light to remotely control Google Assistant, Amazon Alexa, Facebook Portal, and Apple Siri by exploiting a vulnerability in their so-called MEMS microphones.

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