Before joining University of Texas at San Antonio, I was a research associate working for Prof. Gene Tsudik, Secure Computing and Networking Center (SCONCE), Department of Information and Computer Science, University of California, Irvine.
 

Before that, I was post-doc of Prof. Ravi Sandhu, Laboratory for Information Security Technology (LIST), Department of Information and Software Engineering, George Mason University.
 

Before that, I was a graduate student at Department of Computer Science, Fudan University and I obtained my PhD degree in April 2000.