My research covers a wide range of topics in Software (Program) Analysis, Privacy and Security, eCrime, Internet/System Measurement, and Artificial Intelligence. My current research projects are mainly focused on: 1) security, privacy and scam in the mobile app ecosystem; 2) blockchain security; and 3) the intersection of AI and program analysis techniques. My research usually targets top-tier Software Engineering Venues (ICSE/FSE/ASE/ISSTA), Security Venues (CCS/NDSS/Oakland/USENIXSec), Web and Measurement Venues (WWW/IMC/SIGMETRICS).