Low-complexity electronic circuit protected by customized masking
US9197412B2 · kind B2 · utility
1Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2010 |
| Grant date | Nov 24, 2015 |
| Priority date | — |
| Expiry date | Jun 21, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cryptography circuit protected by masking, said circuit including means for encrypting binary words using at least one key krc, means for applying linear processing operations and nonlinear processing operations to said words and means for masking said words. The binary words are unmasked upstream of the nonlinear processing operations by using a mask kri and masked downstream of said processing operations by using a mask kr+1i, the masks kri and kr+1i being chosen from a set of masks that is specific to each instance of the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.