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Production protection system dealing with contents that are digital production

  • US 6,687,683 B1
  • Filed: 10/08/1999
  • Issued: 02/03/2004
  • Est. Priority Date: 10/16/1998
  • Status: Expired due to Term
First Claim
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1. A production protection system dealing with contents that are digital productions and information seen or heard by people, comprising:

  • obtaining means for obtaining data including at least one of a first content, on which a first encryption has been performed and a second content, on which a second encryption has been performed, the second encryption being more difficult to break than the first encryption;

    first content decryption means for decrypting the first content using a first decryption method that corresponds to the first encryption when the data that has been obtained by the obtaining means includes the first content; and

    second content decryption means for decrypting the second content using a second decryption method that corresponds to the second encryption and is more difficult than the first decryption method when the data that has been obtained by the obtaining means includes the second content, wherein the obtaining means and the first content decryption means are realized by a personal computer that executes software for decrypting contents, and the second content decryption means is realized by one of tamperproof hardware and an apparatus that executes tamperproof software.

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