Edwards curves and CM curves

Details Edwards curves and CM curves Edwards curves and CM curves

2009-04-15

arxiv.org/abs/0904.2243v1

Mathematics

Number Theory

Scientific paper

Edwards curves are a particular form of elliptic curves that admit a fast, unified and complete addition law. Relations between Edwards curves and Montgomery curves have already been described. Our work takes the view of parameterizing elliptic curves given by their j-invariant, a problematic that arises from using curves with complex multiplication, for instance. We add to the catalogue the links with Kubert parameterizations of X0(2) and X0(4). We classify CM curves that admit an Edwards or Montgomery form over a finite field, and justify the use of isogenous curves when needed.

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