Method and device for performing substitution table operations
US11265145B2 · kind B2 · utility
0Cited by
3References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2019 |
| Grant date | Mar 1, 2022 |
| Priority date | — |
| Expiry date | Apr 5, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/08
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The disclosure concerns implementing, by a cryptographic circuit, a set of substitution operations of a cryptographic process involving a plurality of substitution tables. For each set of substitution operations of the cryptographic process, a series of sets of substitution operations are performed. One set of the series is a real set of substitution operations corresponding to the set of substitution operations of the cryptographic process. One or more other sets are dummy sets of substitution operations, each dummy set being based on a different permutation of said substitution tables.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.