Representation change of a point on an elliptic curve
US8619977B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2008 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | May 8, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An elliptic curve cryptographic system where point coordinates are transformed from a first coordinate system to a second coordinate system. The transformed coordinates are processed by field operations, which have been modified for operating on the transformed point coordinates. In some implementations, the point coordinates are transformed from an affine coordinate system to a projective coordinate system using a non-random value for the projective coordinate. In some implementations, the transformed projective representation of the point can be changed from a first representation of the point in projective coordinates to a second representation of the point in projective coordinates, where the projective coordinate used in the representation change is a random value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.