Computer Science

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To protect user’s privacy and system’s integrity, mobile platforms use permission models to control accesses to protected resources such as GPS location, Contacts, etc. The previous major version of Android used a static permission model, which compromised the security and privacy of apps. Android 6 overhauled its permission model to ask permissions at runtime which reduces the risk of permission abuse. However, migrating to the runtime permission model requires significant effort from the app developers. In this paper we first present a large-scale formative study to understand how app developers use and migrate to the new permission model. Inspired by these findings, we designed, implemented, and evaluated a tool suite that (i) recommends locations where to insert permission requests and (ii) automatically inserts all the permission-related code. Our empirical evaluations on a diverse corpus of real-world apps show that our tools are highly applicable and accurate.

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[1] P. Wijesekera, A. Baokar, A. Hosseini, S. Egelman, D. Wagner, and K. Beznosov, “Android permissions remystified: A field study on contextual integrity,” in Proceedings of the 24th USENIX Conference on Security Symposium, ser. SEC’15. Berkeley, CA, USA: USENIX Association, 2015, pp. 499–514. [Online]. Available: [2] A. P. Felt, E. Chin, S. Hanna, D. Song, and D. Wagner, “Android permissions demystified,” in Proceedings of the 18th ACM Conference on Computer and Communications Security, ser. CCS ’11. New York, NY, USA: ACM, 2011, pp. 627–638. [Online]. Available: [3] B. P. Sarma, N. Li, C. Gates, R. Potharaju, C. Nita-Rotaru, and I. Molloy, “Android permissions: A perspective combining risks and benefits,” in Proceedings of the 17th ACM Symposium on Access Control Models and Technologies, ser. SACMAT ’12. New York, NY, USA: ACM, 2012, pp. 13–22. [Online]. Available: [4] J. Sellwood and J. Crampton, “Sleeping android: The danger of dormant permissions,” in Proceedings of the Third ACM Workshop on Security and Privacy in Smartphones & Mobile Devices, ser. SPSM ’13. New York, NY, USA: ACM, 2013, pp. 55–66. [Online]. Available: [5] (2016, Aug) F-droid. [Online]. Available: browse

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