Member of the Danish Natural Sciences Research Council (SNF), 1997-2001.
Member of evaluation committees for positions:
(førsteamanuensis i informatikk) at the
University of Bergen, Norway, 1997 and 1998,
(universitetslektorat i
datalogi) at Lund University, Sweden, 1998.
Member of committees evaluating doctoral theses at
University of Chicago,
Norwegian University of Science and Technology, Trondheim,
University of
Aarhus, University of Southern Denmark, Lund University.
Member of program committees: CRYPTO 85, EUROCRYPT 90, WEA 2003, OLA
2004 (chair), ICALP 2007, LATIN 2010.
Session chairman at conferences:
CRYPTO 85, EUROCRYPT 89, CRYPTO 89, EUROCRYPT 90, WEA 2003, ISMP 2003,
ESA 2003, WOAO 2003, SWAT 2004.
Workshop on On-Line Algorithms, OLA 2004, chair, organizing committee.
SWAT 2004, organizing committee.
10th ARCO Workshop on Combinatorial Optimization, organizing committee, 2003.
Algorithms in Quantum Information Processing '98, Aarhus University, organizing committee.
Chicago Workshop on Computational Complexity, organizing committee,
1985.
Invited presentations for
conferences:
INFOCOM panel member: ``Network Security: Present and Future Technology'', 1989.
AMS meeting: special session on Computational Number Theory and
Applications, 1989.
Reviewer for Mathematical Reviews, 1989-present.
Referee for many journals, including
JACM, JCSS, SIAM J. Comp., Theoretical Computer Science, Information Processing Letters, Journal of Scheduling, Journal of Cryptology, Journal of Algorithms, Algorithmica, Combinatorica, IEEE Transactions on Computers, Electronics Letters.
Aalborg University, Aarhus University, Cambridge University, Cornell University, Lund University, University of California - Berkeley, University of Chicago, University of Southern Denmark, University of Toronto, University of Wisconsin - Madison, University of Wisconsin - Milwaukee, Yale University.