Verifying the integrity of a media key block by storing validation data in the cutting area of media
US6738878B2 · kind B2 · utility
22Cited by
4References
24Claims
0Family size
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Key dates
| Filing date | Mar 30, 2001 |
| Grant date | May 18, 2004 |
| Priority date | — |
| Expiry date | Sep 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00362
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for verifying the integrity of a media key block (MKB) by storing validation data in a validation area of a medium, such as a DVD-R or a DVD-RW. In one embodiment, validation data comprises a hash function on a media key block. In another embodiment, validation data comprises the Verification Data field of an MKB's Verify Media Key Record.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.