Storage medium and contents protection method using the storage medium
US7137012B1 · kind B1 · utility
64Cited by
14References
12Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 15, 2000 |
| Grant date | Nov 14, 2006 |
| Priority date | — |
| Expiry date | Nov 24, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2141
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A revocation list is registered a public ROM area. The revocation list designates at least one electronic device in which use of the storage medium by the designated electronic device is to be revoked. A controller receives from the electronic device which attempts to access, identification information indicative of the electronic device, and checks whether identification information corresponding to the received identification information is contained in the revocation list, thereby determining whether or not use of the storage medium by the electronic device which attempts to access should be revoked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.