Verification system for document substance and content
US4568936A · kind A · utility
61Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 31, 1984 |
| Grant date | Feb 4, 1986 |
| Priority date | — |
| Expiry date | Dec 31, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/125
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An authenticator device, e.g. card, of verifiable composition substance and informational content with a system of production and verification. Character uniqueness signals identifying the composition of the device are recorded on the card in an encrypted form combined with statistical data signals representative of information on the card. Testing the card involves freshly sensing the character uniqueness data and entering the statistical data. Such fresh data is then compared with the recorded values after decoding. Favorable comparisons manifest approval and enter the statistical data for processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.