Key management system for digital cinema
US8483393B2 · kind B2 · utility
30Cited by
2References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2006 |
| Grant date | Jul 9, 2013 |
| Priority date | — |
| Expiry date | Nov 28, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/63345
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Key management in a digital cinema system (10, 100 and 1000) occurs by encrypting a feature key associated with encrypted content with a transmission key exchanged with a decryption module (60, 601, 602, 6001, 6002, 6003 and 6004), that serves to decrypt encrypted content. The encrypted feature key undergoes transmission to the decryption module to enable decryption of the encrypted content. In this way, the decryption module will only have the capability of decrypting content based on that module's own key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.