A new hack uses lasers to send inaudible commands to your Amazon Echo

A new photoacoustic flaw in voice assistants such as Siri, Alexa, and Google Assistant can render them vulnerable to a number of attacks that use lasers to inject inaudible commands into smartphones and speakers, and surreptitiously cause them to unlock doors, shop on e-commerce websites, and even start vehicles. The attacks — dubbed Light Commands — were disclosed by researchers from Tokyo-based University of Electro-Communications and University of Michigan. The novel attack works by inserting acoustic signals into microphones using laser light — from as far as 110 meters, or 360 feet — that exploits a vulnerability in MEMS (aka…

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