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Mechanism to search information content for preselected data

  • US 8,312,553 B2
  • Filed: 06/23/2009
  • Issued: 11/13/2012
  • Est. Priority Date: 09/18/2002
  • Status: Expired due to Term
First Claim
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1. A method comprising:

  • storing, at a computer system executing a monitor that lacks access to confidential data having a tabular structure, an index derived from the confidential data, wherein the index defines the tabular structure of the confidential data;

    receiving, by the monitor, information content;

    detecting, by the monitor, in the information content, a sequence of content fragments that is indicative of containing a portion of the confidential data without using the index and without accessing the confidential data having the tabular structure;

    in response to detecting the sequence of content fragments that is indicative of containing a portion of the confidential data, determining by the monitor whether a subset of content fragments within the sequence matches any sub-set of the confidential data using the index derived from the confidential data without accessing the confidential data having the tabular structure; and

    performing a data loss prevention action based on results of determining whether a subset of content fragments within the sequence matches any sub-set of the confidential data.

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