Unauthorized content detection system

Unauthorized content detection system

  • CN 101,329,714 B
  • Filed: 03/24/2005
  • Issued: 06/17/2015
  • Est. Priority Date: 04/02/2004
  • Status: Active Grant
First Claim
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1. a data processing equipment, for using the copyright that recording medium records, this recording medium also in above-noted (i) based on forming multiple data chunk of described copyright and record signed data that multiple docket value of producing and (ii) produce based on the some or all of described multiple docket value, this data processing equipment comprises:

  • Use parts, for using described copyright;

    Alternative pack, in the data chunk selecting predetermined quantity described in each playback during copyright from described multiple data chunk randomly, described predetermined quantity is less than the quantity of all described multiple data chunk;

    Calculating unit, for calculating one or more calculating digest value based on selected data chunk;

    Fetch unit, for reading the multiple residue docket values not comprising the docket value corresponding with calculated calculating digest value from described multiple docket value;

    Signature verification parts, for by utilizing described record signed data, described multiple calculating digest value and described multiple residue docket value, verify that whether described copyright is effective;

    AndUse control assembly, for when described signature verification parts judge that described copyright is invalid time, stop described use parts to use described copyright;

    WhereinDescribed recording medium records multiple primary record digest values thereon, and each in described multiple primary record digest values produces one of in corresponding multiple data block,Each in described multiple docket values that described recording medium records is the digest value that secondary produces according to the primary record digest values of (i) predetermined number and the data block identifier of (ii) predetermined number, the primary record digest values of described predetermined number produces relative to each data chunk of the data block comprising predetermined number, andDescribed calculating unit according to each calculating host computer digest value in multiple selected data block, and by coming to calculate digest value described in secondary calculating to the data block identifier executable operations of calculated host computer digest value, the primary record digest values corresponding with different pieces of information block included in the same data chunk comprising described multiple selected data block and the described predetermined number that corresponds to each digest value.

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