Physical unclonable functions having magnetic and non-magnetic particles
US9553582B1 · kind B1 · utility
9Cited by
11References
41Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2015 |
| Grant date | Jan 24, 2017 |
| Priority date | — |
| Expiry date | Oct 9, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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 systems are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.