More and more apps equipped with ultrasonic tracking capability

Researchers have found 234 Android applications that are constantly listening for ultrasonic beacons in the background, allowing companies to track users’ current location or their habits – without the users’ knowledge. They also found four stores in two European cities that use the technology for user location tracking, but still no use of ultrasonic beacons on TV channels and Top 500 Alexa websites. What is ultrasonic tracking, and how widespread is it? Ultrasonic audio beacons … More

from Help Net Security http://ift.tt/2qrHJRE

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