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Apparatus and method for controlling access to contents stored in card like electronic equipment

  • US 7,039,811 B2
  • Filed: 03/02/2001
  • Issued: 05/02/2006
  • Est. Priority Date: 03/03/2000
  • Status: Expired due to Fees
First Claim
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1. A card like electronic device that is detachably connectable to a data processing device, comprising:

  • a timer circuit for counting time data;

    a control unit for accessing the timer circuit to read the time data; and

    a nonvolatile memory, including a covered area that can be accessed by the control unit, for storing the time data read by the control unit and control data generated by the control unit based on the time data, anda read-only memory accessible only by the control unit and configured to store a program of a certification process used by the control unit,wherein the data processing device is permitted to access the covered area of the nonvolatile memory only after a successful completion of the certification process between the control unit and the processing device.

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