Method and apparatus for certifying services obtained using a portable carrier such as a memory card
US4825052A · kind A · utility
173Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1986 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Dec 30, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/082
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for certifying services obtained with the aid of a portable carrier such as a memory card. A portable carrier (2) such as a credit card is adapted to be connected to an apparatus (1) that calculates a visual record or certificate (C), composed of a result (R) and parameters (PI, PE) necessary for calculating the result. This result is calculated by processing circuits (T2) in the card (2) under the control of a program (P2) recorded in its memory (M2) and of a secret key (S). The result emitted after a service has been furnished can then be recalculated, to certify that the service has been furnished. r
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.