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Finding the group structure of elliptic curves over finite fields

Published online by Cambridge University Press:  17 April 2009

John B. Friedlander
Affiliation:
Department of Mathematics, University of Toronto, Toronto, Ontario M5S 3G3, Canada e-mail: frdlndr@math.toronto.edu
Carl Pomerance
Affiliation:
Department of Mathematics, Dartmouth College, Hanover, NH 03755–355, United States of America e-mail: carlp@gauss.dartmouth.edu
Igor E. Shparlinski
Affiliation:
Department of Computing, Macquarie University, Sydney, NSW 2109, Australia e-mail: igor@ics.mq.edu.au
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We show that an algorithm of V. Miller to compute the group structure of an elliptic curve over a prime finite field runs in probabilistic polynomial time for almost all curves over the field. Important to our proof are estimates for some divisor sums.

Type
Research Article
Copyright
Copyright © Australian Mathematical Society 2005

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