Explore a comprehensive presentation on app-level protection against runtime information gathering on Android devices. Delve into the innovative "App Guardian" technique that safeguards sensitive information without modifying the operating system or target apps. Learn about the pervasive threat of runtime-information-gathering (RIG) attacks and their impact on popular Android-based home security systems. Discover how App Guardian pauses suspicious background processes to thwart malicious monitoring attempts. Examine the unique features of Android that make this approach effective and the careful design considerations for optimal protection. Analyze the experimental results demonstrating App Guardian's success in defeating known RIG attacks while minimizing impact on legitimate app utility and system performance. Gain insights into the broader implications of this approach for Android security and future research directions in the field.