Cable television secure communication system for one way restricted
US8503675B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2009 |
| Grant date | Aug 6, 2013 |
| Priority date | — |
| Expiry date | Sep 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4623
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus permit a one-way downloadable security for electronic signals such as cable television, free-to-air, direct broadcast satellite, electronic device enablement, and other services. The system can allow a broadcast transmission capability (1) to provide an encrypted signal to an individual reception capability (2) in a manner that maintains the full security of a traditional decryption key process while completely eliminating any need for a trusted authority. By including a nascent decryption key generator that may create a secure, key-based environment from an unsecure individualized information transmission (12), a sequence of key(s) from a root key(s) to a derived key(s) to a temporary key(s) and ultimately to a fully random key(s) can be generated in activating a device or a decryption capability for a subscriber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.