Current-mode PUF circuit based on reference current source
US10224931B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 19, 2018 |
| Grant date | Mar 5, 2019 |
| Priority date | — |
| Expiry date | Jul 19, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3278
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A current-mode PUF circuit based on a reference current source comprises an input register, the reference current source, a deviation current comparator and a timing controller. The input register is used for ensuring synchronization of the input challenges to avoid influences of asynchronous challenges on output responses. The reference current source generates a reference current for temperature and voltage compensation. A deviation current source array generates two paths of deviation currents under the control of the input challenges. The deviation current comparator generates and outputs a judgement according to the magnitude of the current provided by the deviation current source array. The timing controller is used for generating timing information for operation of the PUF circuit. The invention has the following advantages: the deviation current source array outputs deviation currents with high robustness and high reliability. Simulation results show that the PUF circuit of the invention has good uniqueness and high reliability of 99.6% when operating under difference temperatures (−40˜120° C.) and different voltages (1.08˜1.32V).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.