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ipShield: A Framework For Enforcing Context-Aware Privacy

Authors: 

Supriyo Chakraborty, Chenguang Shen, Kasturi Rangan Raghavan, Yasser Shoukry, Matt Millar, and Mani Srivastava, University of California, Los Angeles

Abstract: 

Smart phones are used to collect and share personal data with untrustworthy third-party apps, often leading to data misuse and privacy violations. Unfortunately, state-of-the-art privacy mechanisms on Android provide inadequate access control and do not address the vulnerabilities that arise due to unmediated access to so-called innocuous sensors on these phones. We present ipShield, a framework that provides users with greater control over their resources at runtime. ipShield performs monitoring of every sensor accessed by an app and uses this information to perform privacy risk assessment. The risks are conveyed to the user as a list of possible inferences that can be drawn using the shared sensor data. Based on user-configured lists of allowed and private inferences, a recommendation consisting of binary privacy actions on individual sensors is generated. Finally, users are provided with options to override the recommended actions and manually configure context-aware fine-grained privacy rules. We implemented ipShield by modifying the AOSP on a Nexus 4 phone. Our evaluation indicates that running ipShield incurs negligible CPU and memory overhead and only a small reduction in battery life.

Supriyo Chakraborty, University of California, Los Angeles

Chenguang Shen, University of California, Los Angeles

Kasturi Rangan Raghavan, University of California, Los Angeles

Yasser Shoukry, University of California, Los Angeles

Matt Millar, University of California, Los Angeles

Mani Srivastava, University of California, Los Angeles

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BibTeX
@inproceedings {179735,
author = {Supriyo Chakraborty and Chenguang Shen and Kasturi Rangan Raghavan and Yasser Shoukry and Matt Millar and Mani Srivastava},
title = {ipShield: A Framework For Enforcing Context-Aware Privacy},
booktitle = {11th {USENIX} Symposium on Networked Systems Design and Implementation ({NSDI} 14)},
year = {2014},
isbn = {978-1-931971-09-6},
address = {Seattle, WA},
pages = {143--156},
url = {https://www.usenix.org/conference/nsdi14/technical-sessions/presentation/chakraborty},
publisher = {{USENIX} Association},
month = apr,
}
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