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We instrumented the Android platform to collect data regarding how often and under what circumstances smart-phone applications access protected resources regulated by permissions. We performed a 36-person field study to explore the notion of " contextual integrity, " i.e., how often applications access protected resources when users are not expecting it.(More)
Current smartphone operating systems regulate application permissions by prompting users on an ask-on-first-use basis. Prior research has shown that this method is ineffective because it fails to account for context: the circumstances under which an application first requests access to data may be vastly different than the circumstances under which it(More)
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