Data storage device using certification keys and method to perform access control using certification keys
US6792541B1 · kind B1 · utility
11Cited by
12References
56Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 14, 1999 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Jul 14, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S707/99939
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A code range which is the range of usable identification codes (corresponding to file names or directory names) is stored in an area defining area corresponding to a directory, and a layer structure in which the area defining area concerned is set as a parent layer and the other area defining areas are set as child layers is constructed on the basis of the code range. Further, the capacity (empty capacity) of the usable storage area is stored in the area defining area, and the capacity and identification codes which are usable in the layer of an area defining area are restricted by the empty capacity and the code range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.