Document authentication using a mark that is separate from document information
US6496933B1 · kind B1 · utility
24Cited by
9References
52Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 14, 1998 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Oct 14, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3236
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital mark is derived or created for placement on a document to identify, authenticate, or verify the document's origins. Private information is received and digitized. The digitized private information is scrambled in response to the document's contents. The scrambled private information is formed into a mark. The mark is placed on or in the document, apart from the document's information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.