Secret key cryptographic process for protecting a computer system against attacks by physical analysis
US6658569B1 · kind B1 · utility
30Cited by
3References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1999 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Jun 17, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S40/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The invention relates to a secret-key cryptographic calculation process for protecting a computer system against physical attacks, wherein a) the standard cryptographic calculation process is separated into several distinct, parallel process parts using partial intermediate results distinct from those of the standard calculation, and b) the final value of the standard cryptographic calculation is reconstructed from the distinct partial intermediate results.The invention is particularly applicable to computer systems such as embedded systems such as a smart card.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.