Recordable optical disk encrypted with disk identification and multiple keys
US6633853B2 · kind B2 · utility
31Cited by
15References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1999 |
| Grant date | Oct 14, 2003 |
| Priority date | — |
| Expiry date | Dec 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/2562
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk recordable by a recording device and having first and second recording areas, the second recording area having recorded therein disk identification information unique to the disk, and multiple cipher keys, the first recording area being capable of having recorded therein information that is encrypted by using the disk identification information and one of the multiple cipher keys during recording.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.