Method to prevent power dissipation attacks on a cryptographic algorithm by implementing a random transformation step
US7073072B1 · kind B1 · utility
16Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 17, 1999 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Mar 17, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A data protection method using a cryptographic algorithm comprising at least one execution cycle of repetitive operations for processing data elements (K2, R1) so as to generate encrypted information (C). At least one step (120, 220) is provided for randomly modifying the execution of at least one operation from one cycle to another, or at least one of the data elements, so that the encrypted information is unchanged by this random modification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.