Digital fault injection detector
US11366899B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2020 |
| Grant date | Jun 21, 2022 |
| Priority date | — |
| Expiry date | Jul 13, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/71
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A secure Integrated Circuit (IC) includes functional circuitry, and protection circuitry configured to protect the functional circuitry against fault-injection attacks. The protection circuitry includes a plurality of digital detection cells, and protection logic. The detection cells have respective inputs and outputs and are connected output-to-input in at least a chain. In response to a fault-injection attack, a given detection cell in the chain is configured to toggle an output that drives an input of a subsequent detection cell in the chain, thereby causing a pulse to propagate along the chain. The protection logic is configured to receive the pulse from the chain and initiate a responsive action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.