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Electric equipment, and method and program for preventing unauthorized use of same

  • US 20040044903A1
  • Filed: 08/07/2003
  • Published: 03/04/2004
  • Est. Priority Date: 08/08/2002
  • Status: Active Grant
First Claim
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1. Electric equipment comprising:

  • a function limiting section for setting a function limit to the electric equipment so that at least part of functions of the electric equipment becomes unavailable;

    an interface for connecting an external device to the electric equipment;

    a section for obtaining device identification information from an external device connected via the interface to the electric equipment to identify the device;

    a section for associating the function limit with the device identification information of a prescribed external device to thereby obtain a cryptographic key;

    a memory for storing the cryptographic key;

    a determining section for determining whether or not the device identification information obtained from an external device connected via the interface to the electric equipment matches the device identification information of the cryptographic key stored in the memory; and

    a limit canceling section for canceling the function limit set by the function limiting section when the determining section determines that the obtained information matches the cryptographic key.

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