On the day a new computer virus hits the internet there is little that antivirus software can do to stop it until security firms get round to writing and distributing a patch that recognises and kills the virus. Now engineers Simon Wiseman and Richard Oak at the defence technology company Qinetiq's security lab in Malvern, Worcestershire, UK, have come up with an answer to the problem.rnTheir idea, which they are patenting, is to intercept every file that could possibly hide a virus and add a string of computer code to it that will disable any virus it contains. Their system chiefly targets emailedrnattachments and adds the extra code to them as they pass through a mailserver. A key feature of the scheme is that no knowledge of the virus itself is needed, so it can deal with new, unrecognised "zero day" viruses as well as older ones.
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