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DATA AUTHENTICATION METHOD AND DATA AUTHENTICATION SYSTEM

  • US 20110237326A1
  • Filed: 06/06/2011
  • Published: 09/29/2011
  • Est. Priority Date: 07/10/2006
  • Status: Abandoned Application
First Claim
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1. A non-transitory computer readable storage medium for, in use, being accessed by an information processing system of the type including at least one user input device, at least one processor, and a random access memory operatively coupled to the processor, said processor, in use, transferring at least some data and/or instructions stored on the storage medium into the random access memory, said storage medium storing digital data readable by the information processing system, the digital data comprising:

  • at least first and second content portions for, in use, being loaded into said random access memory to provide random accessibility thereof;

    a primary digest table comprising at least first and second stored primary digest values, the first primary digest value comprising a hash transformation of the first content portion, the second primary digest value comprising a hash transformation of the second content portion, said first and second primary digest values for, in use, being compared against calculated values to authenticate said first and second content portions;

    a secondary digest table that includes at least one secondary digest value comprising a hash transformation of at least the first and second primary digest values, said secondary digest value, in use, verifying the authenticity of content portions not necessarily yet loaded into said random access memory by comparison with a value calculated from said first and second primary digest values; and

    a digital signature generated from at least a portion of the secondary digest table, the digital signature being configured to assert the authenticity of the secondary digest table.

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