Method and system for improving the integrity of data on a smartcard
US5869823A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1997 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Jan 3, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/082
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method and a system are proposed for increasing the data integrity on smartcards. In accordance with the invention a sequence of write processes on a smartcard is defined as a unit for which the integrity of the data to be written is ensured. The write process may involve the writing of data to one or more files. The data of an integrity unit i.e. a unit of data for which the integrity is to be ensured is preferably written to shadow memory. The method in accordance with the invention decreases considerably the likelihood that data will be corrupted through an error in writing the data on the smartcard. Data can be restored or completed through the interface of read-write units. The method in accordance with the invention can serve as a basis for maintaining data files external to the smartcard consistent with data on the smartcard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.