Digital receiver and method for receiving secure group data
US7412058B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2003 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Mar 26, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/84
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method and radio receiver are provided for receiving and deciphering RF signals having encrypted data information relevant to the receiver environment. According to one aspect of the present invention, the receiver includes an input for receiving an RF signal having a data stream including a key selector and encrypted data including a message, and a demodulator for demodulating the data stream and outputting encrypted data including the message. The receiver further includes a data decryption circuit including memory for storing one or more groups of decryption keys based on a characteristic of the receiver environment. The data decryption circuit selects a decryption key based on the key selector and decrypts the message based on the selected decryption key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.