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Broadcast encryption key distribution system

  • US 8,094,822 B2
  • Filed: 02/03/2004
  • Issued: 01/10/2012
  • Est. Priority Date: 02/03/2003
  • Status: Active Grant
First Claim
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1. A terminal, comprising:

  • an encryption-key management list table having at least one encryption-key management list comprising a terminal identifier of a different terminal, a unicast encryption key between the terminal and the different terminal, and a broadcast encryption key assigned to the different terminal;

    means for searching the encryption-key management list table for the encryption-key management list including an origination-terminal identifier corresponding to an originating terminal identifier in a received broadcast frame;

    means for extracting a broadcast encryption key from the encryption-key management list that corresponds to the origination-terminal identifier; and

    means for decoding a payload of the broadcast frame using the extracted broadcast encryption key.

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