Security News > 2017 > May > Hundreds of Apps Using Ultrasonic Signals to Silently Track Smartphone Users (The Hackers News)

Your smartphone may have some apps that are continuously listening inaudible, high-frequency ultrasonic sounds from your surroundings and they know where you go, what you like and dislike — all without your knowledge. Ultrasonic Cross-Device Tracking is a new technology that some marketers and advertising companies are currently using to track users across multiple devices and have access to

News URL

http://feedproxy.google.com/~r/TheHackersNews/~3/MK2z_HaetL0/ultrasonic-tracking-signals-apps.html