A Framework for Scanning Privacy Information based on Static Analysis

Modern software brings many conveniences to users through big data, but it also risks privacy leakage. In recent years, privacy leaks have been frequent, and various countries have introduced privacy protection bills to protect users' privacy security and avoid misuse of their private data.The researchers have conducted many studies to protect user privacy, including privacy policy compliance checks and mobile application permission checks. However, little existing work considers the verification of matching software code behavior and privacy policy. In this paper, we propose a set of privacy scanning methods to solve mentioned issues with static code analysis.We first classify privacy text and extracts privacy information. Then we perform static analysis on the code to obtain variable privacy information and privacy propagation paths by combining an abstract syntax tree and the call graph. We also match the results to the text analysis results. The experiments demonstrate that our method outperforms other classification methods in privacy text judgment, with an accuracy rate of 90% in detecting privacy information in the code. Meanwhile, the short running time ensures that no extra overhead is imposed on the user.