Efficient rebinding of partitioned content encrypted using broadcast encryption
US8488793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2009 |
| Grant date | Jul 16, 2013 |
| Priority date | — |
| Expiry date | Sep 5, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/00536
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is a method for rendering media content wherein a request to render a first media content stored in a first partition is received, wherein the first partition stores the first and a second media content; the media content is correlated to a first management key block (MKB), binding ID (IDb) and authorization table (AT); the first MKB, IDb and AT are compared to a current MKB, IDb and AT; and if any of the first MKB, IDb or AT do not correspond to the current MKB, IDb or AT, respectively, generating a second partition by rebinding the first media content with respect to the current MKB, IDb and AT to generate a title key; and associating the first media content, the current MKB, IDb, AT and title key with the second partition, wherein the second media content remains associated with the first MKB, IDb, AT and partition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.