Method of unblocking a locked application using a personal identification number
US8100336B2 · kind B2 · utility
0Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2005 |
| Grant date | Jan 24, 2012 |
| Priority date | — |
| Expiry date | Jan 18, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/1083
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention relates to a method of securing applications on a chip card which is disposed in a digital appliance. A count is made of the number of times a personal identification number of a chip card application is input erroneously. When this number reaches a threshold, the application or the chip card is blocked. The erroneous input count and unblocking the chip card or the application is restarted when the personal identification number of the chip card is input. In this way, PIN-secured applications offer a high level of security without requiring the storing of additional unblocking data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.