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Paper 2015/673
Decaf: Eliminating cofactors through point compression
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.
Metadata
- Available format(s)
- Category
- Public-key cryptography
- Publication info
- A minor revision of an IACR publication in CRYPTO 2015
- Keywords
- Elliptic curvesEdwards curvesMontgomery curvesisogeniesquotient groups
- Contact author(s)
- mike @ shiftleft org
- History
- 2015-07-05: received
- Short URL
- https://ia.cr/2015/673
- License
-
CC BY