Protecting modular inversion operation from external monitoring attacks
US11418334B2 · kind B2 · utility
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17Claims
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Key dates
| Filing date | Oct 8, 2018 |
| Grant date | Aug 16, 2022 |
| Priority date | — |
| Expiry date | Oct 8, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Systems and methods for performing modular inversion operations in a manner protected from external monitoring attacks. An example method comprises: determining, by a processor, a first masked value based on a public cryptographic key and a first random integer value; determining a second masked value based on the public cryptographic key and a second random integer value, and determining, based on the first masked value and the second masked value, a private cryptographic key represented by a modular inversion of the public cryptographic key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.