Techniques for protecting security features of integrated circuits
US10095889B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2016 |
| Grant date | Oct 9, 2018 |
| Priority date | — |
| Expiry date | Sep 10, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2206/1014
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An integrated circuit includes a control circuit, a one-time programmable circuit, and a security feature. The control circuit determines if the one-time programmable circuit is programmed in response to a request by a user of the integrated circuit to access the security feature. The control circuit generates a signal to indicate to the user of the integrated circuit that the security feature has been previously accessed if the control circuit determines that the one-time programmable circuit has been programmed to indicate a previous access to the security feature. The control circuit causes the one-time programmable circuit to be programmed in response to the request if the control circuit determines that the one-time programmable circuit has not been programmed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.