Protection of a DES algorithm
US7764786B2 · kind B2 · utility
4Cited by
4References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2005 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Oct 24, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/046
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for protecting the execution of an algorithmic calculation taking into account at least one valid piece of data and at least one secret key by an integrated circuit, and performing several iterations of an encryption calculation, including executing the algorithm with the valid data between several executions of the same algorithm with invalid data corresponding to a combination of the valid data with predetermined masks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.