When developer's api simplify user mode rootkits developing.
TOMOYO Linux on Android
Apps, apis, third party services (Droidcon)
Android Security - Common Security Pitfalls in Android Applications
Learning, Analyzing and Protecting Android with TOMOYO Linux (JLS2009)
MOBILE APPLICATION SECURITY ON ANDROID
Android101
Android Exploratory Surgery
Security of Mobile Applications Vitaly Shmatikov CS 6431.