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TECHNIQUE FOR DETECTING SUSPICIOUS ELECTRONIC MESSAGES

  • US 20180082062A1
  • Filed: 09/18/2017
  • Published: 03/22/2018
  • Est. Priority Date: 09/19/2016
  • Status: Active Grant
First Claim
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1. A method of detecting suspicious electronic messages, wherein the method is performed in a messaging server which is in communication with a plurality of message senders and a plurality of message receivers, wherein the method comprises the steps of:

  • receiving electronic messages sent from the plurality of message senders to at least one message receiver;

    extracting from each received message at least one message sender feature AF and at least one message content feature CF;

    recording the extracted at least one message sender features AF and at least one message content features CF in a database;

    determining, on the basis of the message content features CFs recorded in the database, whether a specific content feature that can be associated with a current message has already been recorded in the past;

    if the specific content feature has already been recorded in the past, determining, on the basis of the message sender features AFs recorded in the database, a number N of message senders that can be associated with the specific content feature; and

    classifying the current message as suspicious if the determined number N of message senders that can be associated with the specific content feature exceeds a predetermined threshold value N1.

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