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Method and manufacture for preventing unauthorized use by judging the corresponding relationship between logical and physical addresses

  • US 5,661,800 A
  • Filed: 06/28/1996
  • Issued: 08/26/1997
  • Est. Priority Date: 03/18/1994
  • Status: Expired due to Term
First Claim
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1. A method of preventing unauthorized use in a system for reading software/data from physical addresses on a recording medium in accordance with logical addresses instructed by a controller comprising steps of:

  • reading relationship information between the physical addresses and the logical addresses on said recording medium for reading the software/data;

    reading original relationship information between the physical addresses and the logical addresses, for reading from an original recording medium, from the recording medium;

    comparing between the relationship information and the original relationship information;

    identifying unauthorized use of the software/data based on a comparison between the relationship information and the original relationship information.

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