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Selective-subscription descrambling

  • US 4,712,238 A
  • Filed: 06/08/1984
  • Issued: 12/08/1987
  • Est. Priority Date: 06/08/1984
  • Status: Expired due to Term
First Claim
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1. In a subscriber communication network a system for verifying charge information furnished to a broadcast company by a given subscriber and purported by the subscriber as having been displayed at the subscriber terminal, comprisingmeans at the subscriber terminal for providing a debit signal indicating the charges attributed to the subscriber terminal;

  • means at the subscriber terminal for processing the debit signal to provide an authentication signal;

    means at the subscriber terminal responsive to the debit signal for providing to the given subscriber a display of information indicating the charges; and

    means at the subscriber terminal responsive to the authentication signal for providing to the given subscriber a display of information representative of the authentication signal; and

    means at the broadcast company for entering information furnished by the given subscriber that purportedly is the displayed charges information and the authentication information and for converting the same into a received debit signal and a received authentication signal respectively; and

    means for processing the received debit signal with the received authentication signal to determine whether the information furnished by the given subscriber was authentic.

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