Zhenkai Liang (http://www.cs.stonybrook.edu/~zliang) is a Ph.D. candidate of Computer Science Department, Stony Brook University. He is a member of Secure Systems Laboratory directed by Dr. Sekar. His research is centered around the response and recovery aspect of computer security, including mobile code confinement, intrusion detection, attack signatures, and program behavior models. He is the author of "Alcatraz", a user-level implementation of the Safe Execution Environment (SEE) for isolating the effects of mobile code. His paper describing Alcatraz won the best paper award in ACSAC 2003. Before he joined Stony Brook University, he received his B.S. from Peking University, China, and worked for two years as a software engineer in Beijing Huatech Network.