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Medium, apparatus, and method related to encryption resultant information

  • US 6,243,330 B1
  • Filed: 05/05/1999
  • Issued: 06/05/2001
  • Est. Priority Date: 01/29/1992
  • Status: Expired due to Term
First Claim
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1. A reproducing apparatus comprising:

  • reproducing means for reproducing encryption-resultant information from a recording medium;

    decrypting means for decrypting the reproduced encryption-resultant information into decryption-resultant information representing a physical feature of the recording medium;

    detecting means for detecting the physical feature of the recording medium and generating physical-feature information representative of the detected physical feature;

    deciding means for deciding whether or not a predetermined relation exists between the decryption-resultant information and the physical-feature information; and

    suspending means for suspending a specified action when said deciding means decides that the predetermined relation does not exist between the decryption-resultant information and the physical-feature information.

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