Data processing system, memory device, data processing unit, and data processing method and program
US7409554B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2002 |
| Grant date | Aug 5, 2008 |
| Priority date | — |
| Expiry date | Apr 29, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
To provide an improved management structure of memory devices storing service-use applications. A card for a memory device applied to use various services is provided as one child card or more corresponding to each of the services, a parent card-stores data for child-card issue management, and the child-card issue processing is executed based on the parent card, such as parent card authentication. An issue certificate having a parent-card digital signature is stored in the child card, the issue certificate contains a service code and a child-card identification, and thus it becomes possible to confirm a service set in the child card based on the issue certificate as the parent-card signature data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.