He used to work as an expert researcher at NICT, Tokyo, and postdoc researcher at the University of Waterloo, Canada and INRIA, France. He holds a Ph.D. degree (JAIST, Japan) in information science, and a HDR diploma (UPMC, France) in computer science. Zonghua's research covers a broad spectrum of security topics such as anomaly detection, network forensics, security management, reputation systems, and security protocols. He has contributed to dozens of national and international research projects on Cyber security. He is now serving on the editorial board of Computer & Security (COSE), Security and Communication Networks (SCN), International Journal of Network Security (IJNS), and IEEE Communications Magazine.