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Title:
Huff’s Model for Elliptic Curves
Authors: Marc Joye, Mehdi Tibouchi, Damien Vergnaud
Abstract:This paper revisits a model for elliptic curves over Q introduced by Huff in 1948 to study a diophantine problem. Huff’s model readily extends over fields of odd characteristic. Every elliptic curve over such a field and containing a copy of Z/4Z×Z/2Z is birationally equivalent to a Huff curve over the original field. This paper extends and generalizes Huff’s model. It presents fast explicit formulas for point addition and doubling on Huff curves. It also addresses the problem of the efficient evaluation of pairings over Huff curves. Remarkably, the formulas we obtain feature some useful properties, including completeness and independence of the curve parameters.
ePrint: https://eprint.iacr.org/2010/383
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