LibSift: Automated Detection of Third-Party Libraries in Android Applications

Android applications typically contain multiple third-party libraries and recent studies have shown that the presence of third-party libraries may introduce privacy risks and security threats. Furthermore, researchers have reported the importance of considering the third-party libraries for their program analysis tasks. A reason being that the presence of third-party libraries may dilute the features and affect the accuracy of their results. Existing literature typically employs a whitelist to exclude the third-party libraries from their analysis in order to achieve accurate results. However, these whitelists are generally incomplete and weak against the renaming obfuscation technique that is commonly employed in Android applications. In this paper, we propose LibSift, a tool to automatically detect third-party libraries in Android applications. LibSift detects third-party libraries based on package dependencies that are resilient to most common obfuscations. The evaluation results not only indicate that LibSift can detect third-party libraries accurately and effectively, but also show that LibSift can detect even the less popular libraries that are not detected by two of the state-of-the-art approaches.