Method and apparatus for storing and retrieving encrypted programming content using an asymmetric key arrangement
US8433926B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2006 |
| Grant date | Apr 30, 2013 |
| Priority date | — |
| Expiry date | Apr 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2005/91364
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A set top box is provided that includes a receiver/tuner for receiving programming content over a broadband communications network, a secure memory configured to store at least a first cryptography key to be used to encrypt and decrypt the programming content, and a digital storage medium for storing encrypted programming content. The set top box also includes a multimedia processor operationally associated with the receiver/tuner, the secure memory, and the digital storage medium. The multimedia processor is configured to: encrypt programming content using the first cryptography key stored in the secure memory and uniquely associated with the set top box; store the encrypted content on the digital storage medium; encrypt the first cryptography key using an asymmetric public encryption key to form an encrypted first cryptography key; and store the encrypted first cryptography key on the digital storage medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.