Professional Activities



Independent Security Consultant
September 2002 — Present


Tsinghua University
Beijing, P.R. China
March 2004 — August 2006
Visiting Professor in Department of Computer Science


Princeton University
Princeton, NJ
April 2003 — April 2004
Visiting Researcher at Princeton Architecture Laboratory for Multimedia and Security (PALMS)
in Department of Electrical Engineering


NTT Multimedia Communications Laboratories
Palo Alto, CA
April 1999 — August 2002
Director of Security Technologies



RSA Laboratories
San Mateo, CA
August 1994 — February 1999
Senior Research Scientist



Cambridge, MA
September 1989 — June 1994
Ph.D. in Applied Mathematics
I was a graduate student in the Theory of Computation Group
at MIT's Laboratory for Computer Science.


Beijing University
Beijing, P.R. China
September 1985 — July 1989
B.S. in Applied Mathematics