Jiawei's research interests are in the areas of cloud computing and network security, eHealth security, applied cryptography as well as secure and practical systems. Jiawei's research is motivated by the rapid proliferation of cloud computing and novel networks, which are increasingly the platform of choice for vandals and criminals to launch a variety of attacks. Jiawei is always interested in problems that have potential real-world impact, solutions that are simple but based on solid mathematical foundations, and tries to bridge theory and practice.