Digital rights management (DRM) encryption and data-protection for content on device without interactive authentication
US7395438B2 · kind B2 · utility
24Cited by
8References
24Claims
0Family size
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Key dates
| Filing date | Apr 16, 2002 |
| Grant date | Jul 1, 2008 |
| Priority date | — |
| Expiry date | Aug 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/101
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device renders content on a medium by obtaining a table from the medium, obtaining a device key (DK) of the device and an index value of such (DK), indexing into an entry of the table based on the obtained index value, selecting an encrypted secret from the indexed-into entry, applying the obtained device key (DK) to the selected encrypted secret to expose the secret, and applying the exposed secret to render the content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.