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Paper 2004/323
A note on López-Dahab coordinates
Tanja Lange
Abstract
López-Dahab coordinates are usually the system of choice for implementations of elliptic curves over binary fields. We give new formulas for doubling which need one squaring less and one more addition. This leads to a speed-up for binary fields in polynomial basis representation.
Note: Thanks to Mike Scott for pointing out a typo in the mixed addition.
Metadata
- Available format(s)
- PDF PS
- Category
- Public-key cryptography
- Publication info
- Published elsewhere. To appear in proceedings of Wartacryp 2004, Tatra Mt. Math. Publ. 35
- Keywords
- elliptic curvescoordinate systemfast implementation
- Contact author(s)
- tanja @ hyperelliptic org
- History
- 2006-07-20: last of 3 revisions
- 2004-11-24: received
- See all versions
- Short URL
- https://ia.cr/2004/323
- License
-
CC BY