He received his Ph.D. in Computer Science from North Carolina State University in 2006. His research focuses on systems and network security. Dr. Sun has more than 10 years working experience in both industry and academia. He has more than 50 publications and 2 patents. Before joining W&M, he was a Research Professor in George Mason University. Before that, he was a Senior Research Scientist in Intelligent Automation Inc. at Rockville Maryland. He was a Member of the Technical Staff at Bell Labs, Lucent Technology in 2000. His current research focuses on trustworthy computing environment, moving target defense, smart phone security, and password management.