"Your Android’s Accelerometer Could Be Used to Eavesdrop on Your Calls"

A team of researchers have brought attention to a possible side-channel attack on Android phones, called Spearphone. This attack could be executed to eavesdrop on users' phone calls and interactions with their voice assistants via accelerometers in Android phones. Researchers discovered that the accelerometer can be hijacked to sample vibrations from a smartphone's loudspeaker. These vibrations can then be converted to speech, using a combination of signal processing and machine learning. This article continues to discuss how the Spearphone attack works, what the performance of this attack can reveal about users, how users can protect themselves from this attack, and other recent research on side-channel attacks. 

Naked Security reports "Your Android’s Accelerometer Could Be Used to Eavesdrop on Your Calls"