[Resource Topic] 2015/673: Decaf: Eliminating cofactors through point compression

Welcome to the resource topic for 2015/673

Title:
Decaf: Eliminating cofactors through point compression

Authors: Mike Hamburg

Abstract:

We propose a new unified point compression format for Edwards, Twisted Edwards and Montgomery curves over large-characteristic fields, which effectively divides the curve’s cofactor by 4 at very little cost to performance. This allows cofactor-4 curves to efficiently implement prime-order groups.

ePrint: https://eprint.iacr.org/2015/673

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