Anti-pirate method for the distribution of digital content by pro-active diversified transmission, associated transmitting device and portable receiving object
US7672456B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2002 |
| Grant date | Mar 2, 2010 |
| Priority date | — |
| Expiry date | Apr 20, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/606
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention concerns an anti-pirate method for the distribution of digital content by pro-active diversified transmission, associated transmitter device and portable receiving object. The method, designed to make the same information (Kc) available to several receivers (1) belonging to a group (G) of receivers, each receiver storing information (SAi) specific to it, is characterized in that it includes the following steps: define a relation Kc=f(K, bi, SAi) where (f) is a given function, (K) is information common to all the receivers, and (bi) is information different for each receiver and for each value of the information (K); —enable each receiver to access information (bi) before making (Kc) available; and transmit the information (K) to all receivers, just before making (Kc) available; so that each receiver can calculate information (Kc) using said relation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.