Methods of making physical unclonable functions having magnetic and non-magnetic particles
US10410779B2 · kind B2 · utility
1Cited by
29References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2015 |
| Grant date | Sep 10, 2019 |
| Priority date | — |
| Expiry date | Aug 31, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY04S40/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of making a physical unclonable function (PUF) having magnetic and non-magnetic particles is disclosed. Measuring both magnetic field and image view makes the PUF difficult to counterfeit. PUF may be incorporated into a user-replaceable supply item for an imaging device. A PUF reader may be incorporated into an imaging device to read the PUF. Other methods are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.