“Fitness tracking devices monitor heartbeats, measure steps, sleep, and tie into a larger ecosystem of goal setting, diet tracking, and other health activities. Every Step You Fake investigates the privacy and security properties of eight popular wearable fitness tracking systems. We use a variety of technical, policy, and legal methods to understand what data is being collected by fitness tracking devices and their associated mobile applications, what data is sent to remote servers, how the data is secured, with whom it may be shared, and how it might be used by companies. This research is led Open Effect, with significant contributions from the Citizen Lab at the Munk School of Global Affairs, University of Toronto. The project is funded by the Office of the Privacy Commissioner of Canada’s Contributions Program.”