Digital receiver and method for receiving secure group data

Details Digital receiver and method for receiving secure group data Digital receiver and method for receiving secure group data

2003-03-18

2008-08-12

Sheikh, Ayaz (Department: 2131)

Cryptography

Communication system using cryptography

Wireless communication

C380S270000, C380S278000, C380S043000, C713S152000, C713S194000

Reexamination Certificate

active

07412058

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.

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