Method for securing a multiple point multiplication operation against side-channel attacks
US12388615B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 2022 |
| Grant date | Aug 12, 2025 |
| Priority date | — |
| Expiry date | Apr 1, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/046
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Provided is a method for securing against side channel attacks. An elliptic curve cryptographic process comprises a multiple points multiplication operation using predetermined scalar values, Pi being points of an elliptic curve over a finite field defined by parameters (F, E, G, N) together with the point addition law where F is a field over which is defined the curve, E is an equation of the curve, G is a base point in E over F and N is the order of the base point G. The method comprises generating (S1) a masking value iRand, multiplicatively masking (S2) each predetermined scalar value di with said generated masking value iRand to obtain masked scalars di′, computing (S3) a masked multiple points multiplication operation result, and obtaining (S4) said multiple points multiplication operation result R by unmasking said masked multiple points multiplication operation result R′.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.