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Bring-your-own-device (BYOD) is getting popular. Diverse personal devices are used to access enterprise resources, and deployment of the solutions with customized operating system (OS) dependency will thus be restricted. Moreover, device utilization for both business and personal purposes creates new threats involving leakage of sensitive data. As for functionalities, a BYOD solution should isolate an arbitrary number of entities, such as those relating to business and personal uses and provide fine-grained access control on multi-entity management. Existing BYOD solutions lack in these aspects; we propose a system, called AppShield, which supports multi-entity management and role-based access control with file-level granularity, apart from local data sharing/isolation. AppShield includes (1) application rewriting framework for Android apps, which builds Mobile Application Management (MAM …