Multi-tier digital TV programming for content distribution
US6834110B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1999 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Dec 10, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/958
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of securely providing data to a user's system over a broadcast infrastructure. The method comprising the steps of: encrypting the data using a first encrypting key; encrypting a first decrypting key using a second encrypting key; dividing at least part of the encrypted data into a series of logical packages; placing at least some of the logical packages into a broadcast carousel for cyclical broadcast over the broadcast infrastructure; broadcasting the packages in broadcast carousel so that they can be received by at least one user's system, wherein the broadcast is cyclical and repeats periodically; and transferring the encrypted first decrypting key, which has been encrypted with the second encrypting key, to the user's system.In another embodiment, a system is disclosed to carry out the above method in a broadcast infrastructure and an image overlaid on top of a primary image being displayed isused to denote that additional logical packages are available for receipt by broadcast.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.