System and method for blocking harmful information online, and computer readable medium therefor

CAFC
  • US RE42,196 E1
  • Filed: 06/12/2008
  • Issued: 03/01/2011
  • Est. Priority Date: 12/31/1999
  • Status: Expired due to Term
First Claim
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1. A method for blocking in real time harmful information in a file to be executed, the method comprising the steps of:

  • (a) on a computer network through which a web server and a client system are linked to each other, the web server receiving a connection request from the client system over the computer network;

    (b) the web server transmitting a harmful information blocking code module to the client system; and

    (c) once the transmission of the harmful information blocking code module is completed, the harmful information blocking code module automatically running on the client system to block in real time harmful information including computer viruses, wherein the step (c) comprises steps of;

    (c1) inspecting file input/output (I/O) on the client system by hooking up file I/O routines, (c2) determining whether the file to be executed corresponding to the inspected file input/output in the step (c1) is harmful or not; and

    (c3) treating a file determined to be harmful in the step (c2) and executing the file, if it can be treated, and aborting the execution of the file determined to be harmful in the step (c2), if it cannot be treated.

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