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Trail log analysis system, medium storing trail log analysis program, and trail log analysis method

  • US 9,262,473 B2
  • Filed: 12/19/2012
  • Issued: 02/16/2016
  • Est. Priority Date: 06/30/2010
  • Status: Active Grant
First Claim
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1. A trail log analysis system comprising:

  • a processor that;

    defines as comparison targets a subject, an object, and an action in a trail log of an information system, count an event occurrence number for each time zone corresponding to an event occurrence time recorded on a trail log to be analyzed which was last collected for each combination of the comparison targets, and generates a first information development table;

    generates a second information development table by accumulating the event occurrence number of the first information development table corresponding to a trail log recorded previously and up to a time point immediately before the last collected trail log to be analyzed when the event occurrence number of the first information development table corresponds to a normal event, wherein the processor does not accumulate the event occurrence number of the first information development table in the second information development table when the event occurrence number of the first information development table corresponds to an abnormal event; and

    compares the first information development table with the second information development table, and outputs a comparison result,wherein the processor detects an event corresponding to a combination A as a newly performed operation and outputs the comparison result when the combination A of the comparison targets included in the first information development table does not exist in combinations of the comparison targets of the second information development table.

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