Xinwen Zhang is the Principal Engineer and Sr. Director at
Secure Enterprise Group, Mobile Communication Lab, Samsung
Research America, at Mountain View, CA, USA. His research 
interests include security policies, models, architectures, 
and mechanisms in general computing and networking systems. 
Currently he focuses on security enhanced Android platform 
and MDM systems for enterprise. He has a Ph.D. in information 
security from George Mason University, Fairfax, Virginia, USA. 
Contact him at xinwenzhang@gmail.com.