Method of secure cryptographic calculation, in particular, against attacks of the DFA and unidirectional type, and corresponding component
US8958556B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2012 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Dec 30, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/004
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of secure cryptographic calculation includes formulating a first list of first random quantities, formulating a first non-linear substitution operator masked with at least part of the first list, and formulating a second list determined from the first list. The second list includes second random quantities respectively determined from the first random quantities. A second non-linear substitution operator masked with at least part of the second list is formulated. At least two successive implementations of a cryptographic calculation algorithm are performed that includes N rounds of calculations carried out successively to obtain output data based on input data and of a secret key, with a data path of the cryptographic calculation algorithm being masked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.