Constant time secure arithmetic-to-Boolean mask conversion
US11822704B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Oct 28, 2019 |
| Grant date | Nov 21, 2023 |
| Priority date | — |
| Expiry date | Jul 1, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/046
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A first arithmetic input share and a second arithmetic input share of an initial arithmetically-masked cryptographic value are received. A sequence of operations using the arithmetic input shares and a randomly generated number is performed, where a current operation in the sequence of operations generates a corresponding intermediate value that is used in a subsequent operation. At the end of the sequence of operations, a first Boolean output share and a second Boolean output share are generated. The arithmetic-to-Boolean mask conversion is independent of the input bit length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.