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System and methods for detecting malicious email transmission

  • US 8,931,094 B2
  • Filed: 03/21/2013
  • Issued: 01/06/2015
  • Est. Priority Date: 08/16/2001
  • Status: Active Grant
First Claim
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1. A method for monitoring transmission of email through a computer system, said computer system comprising a server and one or more clients having an email account, the method comprising:

  • (a) gathering statistics relating to transmission behavior of prior emails relating to a first email account on said computer system;

    (b) generating a profile relating to the transmission behavior of email relating to said first email account based on said statistics, wherein generating a profile comprises grouping email addresses into one or more cliques based on the prior occurrence of email addresses within the same emails in a group of mails; and

    (c) determining if a violation of email security has occurred by comparing one or more select emails relating to said first email account to said profile.

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