System and method for assigning sequence keys to a media player to enable hybrid traitor tracing
US7630497B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2005 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Oct 29, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/606
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hybrid traitor-tracing enabling system comprises an inner code and a multi-level outer code. The inner code comprises encrypted tables comprising codewords for file segment variations. One level of the multi-level outer code comprises assignments of a cluster of sequence keys to manufacturers or models of media players. Another level comprises assignments to the media players of sequence keys within the cluster. The system enables tracing of only a manufacturer or model, or a manufacturer, model, and a media player. When tracing a manufacturer or model, the system enables detection with relatively few recovered files. With additional recovered files, the media player used for piracy can be discovered. Furthermore, the present system enables detection of collusion between manufacturers or models and collusion between individual media players.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.