Method for protectedly debiting an electronic payment means
US5991412A · kind A · utility
30Cited by
4References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1996 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Dec 9, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/0866
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method for protected transactions involving a so-called smart card and a terminal, such as a cash register. In order to prevent the smart card from simultaneously carrying out transactions with several terminals, the invention provides an authentication value which is used in the data exchange between the smart card and the terminal to uniquely identify subsequent steps of the transaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.