Share domain arrangements for masked hardware implementations
US12307000B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2020 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Aug 5, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0662
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Hardware masking may be used as a countermeasure to make power analysis attacks more difficult. Masking attempts to decouple the secret and/or processed values of a cryptographic algorithm from its intermediate values. One method of masking probabilistically splits each bit of a computation into multiple shares. Mask-share domains (i.e., the wires and gates that perform a computation on a share) are physically spaced to reduce coupling between mask-share domains. The mask-share domains may be connected to the same power supply network. The physical distance between mask-share domains along the power-supply network may be selected to reduce coupling between mask-share domains that may occur via the power supply network. The mask-share domains may each be connected to different on-chip power supply networks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.