Cyber-security has been a hot topic since the Stuxnet incident of a few years ago. Previously it was thought that securing the 'top end' of an organisation was an adequate solution but this incident and others like it completely changed the security landscape and highlighted vulnerabilities in the de-facto automation architecture that previously had not been considered. It shifted the problem to the automation domain, which had often operated under the radar and outside the remit of IT. Engineers suddenly started to reconsider their cyber-security arrangements. It was realised that many people may want to bring a plant to its knees, for political or commercial reasons, because they hold what they see as a legitimate grievance or simply to see what will happen.
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