Data carrier and data carrier system
US8109445B2 · kind B2 · utility
2Cited by
6References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2007 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | Sep 1, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A region to store authentication commands to perform authentication between a data carrier and a reader/writer device is divided into at least three areas, and as for the three areas, a first authentication command is stored in a first area, a second authentication command is stored in a second area, and a third authentication command is stored in a third area, and security levels can be selected depending on a command of an inquiry signal (41) transmitted from a reader/writer device (10), and thereby selection of the security level suitable for circumstances can be realized by a simple constitution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.