Storage medium processing method, storage medium processing device, and program
US8126150B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2005 |
| Grant date | Feb 28, 2012 |
| Priority date | — |
| Expiry date | Dec 24, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/062
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Spread of a forged storage medium is prevented suppressing an authentic storage medium's damage and trouble of a owner to the minimum. When there is an update request of user key data, the update history of the user key data concerning the shown above-mentioned medium identifier IDm is referred to. When judged that the update of the user key data concerning the shown medium identifier IDm not being performed within a predetermined period, the update of user key data is performed. The request of a update is refused when judged that the update of the user key data concerning the shown medium identifier IDm being performed within a predetermined period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.