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Transaction safety system for falsely indicating successful completion of illegal transaction

  • US 4,675,815 A
  • Filed: 02/08/1984
  • Issued: 06/23/1987
  • Est. Priority Date: 02/18/1983
  • Status: Expired due to Fees
First Claim
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1. A transaction safety system in a data processing system which includes a transaction device, having an input portion and an output portion for providing a transaction result according to transaction data supplied by the input portion, operatively connected to a processing device, having a client file, for processing the transaction data received by the transaction device, the processing device operatively connected to a monitoring device, geographically separated from the transaction device, for monitoring transactions of the transaction device, said transaction safety system comprising:

  • alarm signal sending means, provided in the transaction device, for sending an alarm signal when the transaction data received by the transaction device includes a special code;

    file control means, operatively connected to said alarm signal sending means, for preventing update of the client file when the alarm signal is received by the processing device;

    result sending means for sending the transaction result to the transaction device in dependence upon the transaction data supplied by the input portion regardless whether the transaction data includes the special code and for sending the alarm signal to the monitoring means; and

    controlling means, operatively connected to said alarm signal sending means, for driving said alarm signal sending means when the special code is input on the input portion.

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