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On 26 August this year, Montenegro’s state infrastructure was hit by an “unprecedented” cyber attack, and national government officials expressed alarm. “Certain services were switched off temporarily for security reasons, but the security of accounts belonging to citizens and companies and their data have not been jeopardised,” public administration minister Maras Dukaj announced on Twitter. This is only the most recent of a series of large-scale assaults on European grids, systems, subsystems, equipment, software and services. In an article for a leading electricity industry magazine, Bernard Montel, Europe, Middle East and Africa (EMEA) security strategist and technical director at Tenable Corp, outlined the growing threat of cyber attacks on utilities by both state actors and criminals. Montel expressed particular alarm because the amount of digitisation currently under way throughout the industry “brings together previously separate systems and allows attackers to exploit weak points in one before moving across to another”....