Gyroscopes in Your Phone Could Let Apps Eavesdrop on Conversations

TheWindBringeth · Aug 15, 2014

http://www.wired.com/2014/08/gyroscope-listening-hack/

In a presentation at the Usenix security conference next week, researchers from Stanford University and Israel’s defense research group Rafael plan to present a technique for using a smartphone to surreptitiously eavesdrop on conversations in a room—not with a gadget’s microphone, but with its gyroscopes, the sensors designed measure the phone’s orientation.
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Both iOS and Android devices use gyroscopes that can pick up sound vibrations, Boneh says. And neither requires any apps to seek permissions from users to access those sensors. But iOS limits the reading of the gyroscopes to 100 hertz, which makes audio spying far harder to pull off. Android allows apps to read the sensor’s data at twice that speed. And though Chrome or Safari on Android limit websites to reading the sensor at just 20 hertz, Firefox for Android lets websites access the full 200 hertz frequency. That means Android users visiting a malicious site through Firefox could be subject to silent eavesdropping via javascript without even installing any software.
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mirimir · Aug 15, 2014

No smartphones for mirimir, thank you.

But for _______ ____ ___________, I love them

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Gyroscopes in Your Phone Could Let Apps Eavesdrop on Conversations

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