Bio: Ph.D. in 1995 and Habilitation degree in 1999, both from Friedrich-Schiller-Universitaet Jena, Germany. Visiting Scholar (1993-1994) and Visiting Assistant Professor (1997-1998) at the University of Rochester. Heisenberg Fellowship from the Deutsche Forschungsgemeinschaft in 2000. Associate Professor for Theoretical Computer Science at Heinrich-Heine-Universitaet Duesseldorf, Germany, since 2000. Research areas: computational complexity theory, cryptology, and algorithmics.