From WNYC’s Note to Self, your various microphone-enabled devices very well could be listening to you.
Do we know whether our gadgets are passively listening to us? No. We don’t know for sure, beyond what they tell us in their privacy policies. But we do know that voice recognition is what many major companies are trying to get us to start using.
Or maybe a better question is how frequently and on whose behalf are our devices listening to (and watching) us? The episode also features an interview with Walter Kirn who wrote If You’re Not Paranoid, You’re Crazy in the Atlantic.
See also this security paper from USENIX: Hidden Voice Commands