System and method for performing netlist obfuscation for a semiconductor device
US11411749B2 · kind B2 · utility
1Cited by
3References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2020 |
| Grant date | Aug 9, 2022 |
| Priority date | — |
| Expiry date | Dec 20, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K19/003
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A tie cell includes a first flip-flop having a physically unclonable function (PUF), a second flip-flop that generates a PUF key value, and logic that logically combines the PUF value and the PUF key value to generate an output signal having a constant logical value. The PUF value is based on a power-up value stored in the first flip-flop, which power-up value is generated based on physical and/or electrical characteristics produced from a manufacturing process. The output value is generated to tie digital logic to the constant logical value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.