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Method and system for controlling and filtering files using a virus-free certificate

  • US 20020016925A1
  • Filed: 01/02/2001
  • Published: 02/07/2002
  • Est. Priority Date: 04/13/2000
  • Status: Active Grant
First Claim
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1. A method comprising the steps of:

  • employing a virus-free certificate firewall in controlling and filtering files using a virus-free certificate including;

    receiving a file;

    if a virus-free certificate is required for the file, determining whether the a virus-free certificate is already associated with the file;

    if a virus-free certificate is already associated with the file, authenticating the associated virus-free certificate, said virus-free certificate comprising a certificate signature;

    if the virus-free certificate is authenticated, determining whether the file is virus-free or not;

    if the file is virus-free, forwarding the file with the associated virus-free certificate;

    if the virus-free certificate is not authenticated or if no virus-free certificate is associated with the file determining whether the file is virus-free or not;

    if the file is virus-free, associating with the file a new virus-free certificate, and forwarding the file with the new virus-free certificate.

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