Protection of the execution of a DES algorithm
US8144865B2 · kind B2 · utility
1Cited by
11References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 19, 2006 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Jun 3, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/003
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for protecting an execution, by an integrated circuit, of a ciphering and/or deciphering algorithm taking into account data and at least one valid key and performing several iterations of the same calculation, including at least one execution of an iteration with the valid key between several executions of the same iteration with the invalid keys obtained by applying at least one non-linear one-way function to the valid key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.