|Image courtesy blackzheep of at FreeDigitalPhotos.net|
This clever hack relies upon the headphone jack, which has a microphone input on virtually all modern smartphones. The main limitation of the method developed by ANSSI is that the target device needs to have headphones with a mic plugged into the device. That’s because the electromagnetic waves must use the cord as an antenna to access the mic input. The electrical signals can be made to look like a user’s voice, thus activating Siri or Google.
Read more: http://www.extremetech.com/mobile/216290-researchers-figure-out-how-to-silently-hack-siri-and-google-voice-search