Title
Uncovering Privacy Leakage in BLE Network Traffic of Wearable Fitness Trackers.
Abstract
There has been a tremendous increase in popularity and adoption of wearable fitness trackers. These fitness trackers predominantly use Bluetooth Low Energy (BLE) for communicating and syncing the data with user's smartphone. This paper presents a measurement-driven study of possible privacy leakage from BLE communication between the fitness tracker and the smartphone. Using real BLE traffic traces collected in the wild and in controlled experiments, we show that majority of the fitness trackers use unchanged BLE address while advertising, making it feasible to track them. The BLE traffic of the fitness trackers is found to be correlated with the intensity of user's activity, making it possible for an eavesdropper to determine user's current activity (walking, sitting, idle or running) through BLE traffic analysis. Furthermore, we also demonstrate that the BLE traffic can represent user's gait which is known to be distinct from user to user. This makes it possible to identify a person (from a small group of users) based on the BLE traffic of her fitness tracker. As BLE-based wearable fitness trackers become widely adopted, our aim is to identify important privacy implications of their usage and discuss prevention strategies.
Year
DOI
Venue
2016
10.1145/2873587.2873594
HotMobile
Field
DocType
Citations 
Traffic analysis,Fitness Trackers,Wearable computer,Computer security,Computer science,Popularity,Real-time computing,Bluetooth Low Energy
Conference
22
PageRank 
References 
Authors
1.30
6
4
Name
Order
Citations
PageRank
Aveek K. Das168352.00
Parth H. Pathak242930.98
Chen-Nee Chuah32006161.34
Prasant Mohapatra44344304.46