2004:
University of Pennsylvania
University of Michigan
2003:
Microsoft Theory group
University of Washington
University of Florida
2002:
University of Pennsylvania
University of Miami
University of Minnesota
North Carolina State University
University of Kentucky
Tulane University
Denver University
2001:
LACIM
IDA-Princeton
University of Pennsylvania
University of Minnesota
University of Rhode Island
Rutgers University
Drexel University
George Washington University
Ohio State University
2000:
University of Pennsylvania
Temple University
Ohio State University
MIT
1999:
National Security Agency
Dartmouth College
University of California, San Diego
1998:
University of Marne-La-Vallee
University of California, San Diego