..to be completed
ANTS II: Algorithmic Number Theory Symposium, Universite de Bordeaux, May 20, 1996.
Oberwolfach Meeting on Finite Fields, Oberwolfach, Germany, January 20, 1997.
Connecticut Valley Undergraduate Colloquium Series, UMass, Amherst, April 23, 1997.
AGCT-6: Arithmetic, Geometry, and Coding Theory, C.I.R.M. Luminy, France, June 24, 1997.
AMS Summer Research Conference, Applications of Curves over Finite Fields, Seattle, 1997.
European Research Conference, Number Theory and Arithmetical Geometry, Spain, Oct 1997.
ICCC: 2nd International Conference on Coding Theory and Cryptography, Mexico, April, 1998.
AMS Fall Western Section Meeting, Tucson, Arizona, November 14-15, 1998
Oberwolfach Meeting on Explicit Methods in Number Theory, Oberwolfach, July, 1999.
AGCT-7: Arithmetic, Geometry, and Coding Theory, October, 1999, C.I.R.M., Luminy, France
Workshop on Unusual Applications of Number Theory, 10-14 January 2000, DIMACS
AMS Western Section Regional Meeting, Invited Address, October, 2000, San Francisco
MSRI Workshop on Number Theory, Genus three curves over finite fields October, 2000
Sixth Pacific North West Number Theory Conference Vancouver, March 2002.
IPAM New Trends in Cryptography, April 2002
University of Michigan Undergraduate Colloquium, April 2002
High Primes and Misdemeanours, Lectures in honour of Hugh Williams, Banff 2003
Pacific Northwest Number Theory Conference, Vancouver, April 2004
BIRS Workshop: Explicit Methods in Number Theory, November, 2004
BIRS Workshop Number Theory Inspired by Cryptography November, 2005.