Method and apparatus for image-based validations of printed documents
US5673320A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1995 |
| Grant date | Sep 30, 1997 |
| Priority date | — |
| Expiry date | Feb 23, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/122
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Multiple validations of printed documents incorporating image information and authorizing data on a printed document assist in the printed document validation process. This technique requires the authorized document holder to have an image identification accompany the application or production of the document. Image information is converted to a storable image that is used in one of a plurality of validating schemes that assures that the presenter of the printed document is not a substitute. Such schemes included visual comparison of the printed document presenter and extracted image information and validation that the data has not been altered. Non-reversible encryption of the data, as it is read from the document at the document presentation site is used to formulate encoded authorization data that is then compared against like encoded authorized document holder data stored at a centrally located data base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.