Roll back method for a smart card
US7455234B2 · kind B2 · utility
0Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 2003 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | Oct 29, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/105
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a data carrier (2) for contactless communication of storage data (SD) with a reader station (1), a recovery device (13) is provided, with which, following an unexpected abort of the storing of storage data (SD) in a memory (11) by virtue of a lack of supply voltage, a valid storage state can be restored in memory (11). For this purpose, any storage locations that are only weakly stored in memory (11) will be read, and the read-out storage data (SD) will be re-stored in the memory (11).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.