A Skewness-Based Framework for Mobile App Permission Recommendation and Risk Evaluation

Mobile ecosystem has penetrated into people’s daily life over these years and most web services are now using mobile application for service consumption. Permission system has been developed to protect the sensitive and valuable information stored in mobile. However, due to the complexity of permission framework, the permission over-privilege problem has become a serious problem bringing huge risk for the mobile ecosystem. Therefore, in this paper, we present a skewness-based framework for permission recommendation and risk evaluation, intending to facilitate the permission configuration and identify the risk applications. Specially, the topic model Latent Dirichlet Allocation is presented to build the mapping between app’s functionality and permission. Then a two-phase skewness-based filtering strategy is developed and combined with the collaborative filtering framework to remove the abnormal applications and permissions. Finally, the high risk permissions for each application are identified based on the difference between the malicious applications and popular applications. The experiments based on the Apps from Google Play shows that comparing with the state-of-the-art; our approach can effectively remove the abnormal applications and permissions, identify the unexpected and risk permissions, as well as generate the recommended permission configurations with better performance to reduce the permission over-privilege problem.