Non contact type IC card
US6679424B2 · kind B2 · utility
2Cited by
10References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2002 |
| Grant date | Jan 20, 2004 |
| Priority date | — |
| Expiry date | Nov 5, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q20/357
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A memory (1) in a non contact type IC card (100) includes a data protection region (B2) storing data requiring security and an region (B1) storing other data. A main control circuit (2) generates data to be stored and designates a location for data storage in the region (B1) or the data protection region (B2) according to a content of the data. An address non selecting circuit (4) selects whether the generated data is to be written into the location in the data protection region (B2) designated by the main control circuit (2) according to a state of a state setting circuit (3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.