Method of checking authenticity of sheet with built-in electronic circuit chip
US6659353B1 · kind B1 · utility
17Cited by
5References
15Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 27, 2001 |
| Grant date | Dec 9, 2003 |
| Priority date | — |
| Expiry date | Nov 27, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07D7/2033
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method of checking sheets as to forgery thereof, the sheet being provided with an electronic circuit chip from which information can be read out or written and having visible information. The method includes a step of encrypting the visible information of the sheet and storing the encrypted visible information in the electronic circuit chip, and a step of determining discriminatively the authenticity of the sheet by comparing the visible information of the sheet with the information stored in the electronic circuit chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.