Method for randomly modifying the consumption profile of a logic circuit, and associated device
US11049419B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2018 |
| Grant date | Jun 29, 2021 |
| Priority date | — |
| Expiry date | Sep 13, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In an embodiment, a circuit includes a supply terminal, a reference terminal, a logic circuit coupled between the supply terminal and the reference terminal, and an auxiliary circuit coupled to the logic circuit. The auxiliary circuit includes a plurality of switches configured to be controlled to produce random criterions. Each random criterion causes, on each transition of an output signal of the logic, an attenuation of a current flowing between a supply terminal of the circuit and a reference terminal of the circuit; or an increase of the current flowing between the supply terminal of the circuit and the reference terminal of the circuit; or an additional current flowing through the logic circuit on a current path not passing through the supply terminal; or no change in the current flowing between the supply terminal of the circuit and the reference terminal of the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.