Chaperone is a smartphone loss prevention solution based on active acoustic sensing. It proactively sends an inaudible acoustic signal and analyzes its echoes to estimate the user's motion state and detect if the user is leaving. The repository provides the source code of Chaperone and experiment scripts as well as other supplementary materials. It consists of three folders:
- demo: the Android source code of Chaperone demo
- evaluation: Python scripts for the experiments in the Chaperone paper
- user_study: supplementary document for the user study in the Chaperone paper
Please refer to the README.md file in each folder for details.
Chaperone is introduced in the following paper:
Chaperone: Real-time Locking and Loss Prevention for Smartphones. (Usenix page) Jiayi Chen, Urs Hengartner, Hassan Khan, Mohammad Mannan. USENIX Security Symposium, Aug 12-14, 2020.