Account file for off-line transaction authorization
US5396624A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 3, 1993 |
| Grant date | Mar 7, 1995 |
| Priority date | — |
| Expiry date | Aug 3, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99939
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
An approach for handling data representative of invalid transaction cards is disclosed. A memory area 34 in a transaction terminal 16 is divided into a plurality of stacks. Two digits of the invalid account number are used to identify the stack into which the remainder of the account number is added. Stack start pointers are provided for file management. As the newest entries are added to the list, the oldest entries are purged. The subject system allows a large number of accounts to be stored in a minimum of space. Updates of the file can be easily handled during direct communication sessions between a central processor 12 and the terminal 16.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.