The effectiveness of application permissions

Abstract

Traditional user-based permission systems assign the user’s full privileges to all applications. Modern platforms are transitioning to a new model, in which each application has a different set of permissions based on its requirements. Application permissions offer several advantages over traditional user-based permissions, but these benefits rely on the assumption that applications generally require less than full privileges. We explore whether that assumption is realistic, which provides insight into the value of application permissions. We perform case studies on two platforms with application permissions, the Google Chrome extension system and the Android OS. We collect the permission requirements of a large set of Google Chrome extensions and Android applications. From this data, we evaluate whether application permissions are effective at protecting users. Our results indicate that application permissions can have a positive impact on system security when applications ’ permission requirements are declared upfront by the developer, but can be improved. 1

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