Circuit that includes a physically unclonable function
US10256983B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2016 |
| Grant date | Apr 9, 2019 |
| Priority date | — |
| Expiry date | Jan 16, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/34
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Described herein are various technologies pertaining to authentication of integrated circuits by using external factors to affect or modify an output of a physically unclonable function (PUF) circuit. In an example, the output of the PUF circuit in response to a challenge signal can be sensitive to changes in environmental factors. In another example, the output of the PUF circuit can be sensitive to user-selectable configuration parameters of the PUF circuit. In yet another example, the output of the PUF circuit can be modified by additional circuitry external to the PUF circuit based upon one or more selectable or configurable inputs. A PUF-based device authentication system that uses external factors as authentication inputs to affect a challenge response of the device authentication system can enhance authentication capabilities by permitting multi-factor authentication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.