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Data broadcasting system

  • US 5,506,902 A
  • Filed: 04/15/1994
  • Issued: 04/09/1996
  • Est. Priority Date: 04/20/1993
  • Status: Expired due to Term
First Claim
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1. A data broadcasting method for transmitting predetermined data via a broadcasting channel, comprising the steps of:

  • scrambling retrieval page and article page data including one of a newspaper, a magazine, and a book using a scramble key to obtain scrambled data;

    encrypting data related to the scramble key, common information, a receiver ID, and subscription terms to obtain encrypted related data;

    inserting the scrambled data and the encrypted related data into a predetermined artificial satellite channel;

    transmitting the predetermined channel including the scrambled data and encrypted related data via an artificial satellite;

    receiving the transmitted scrambled data and encrypted related data from said artificial satellite;

    decrypting the received encrypted related data to obtain decrypted related data; and

    unscrambling the received scrambled data using the received scrambler key to obtain unscrambled data to reproduce said newspaper, magazine, and book.

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