Cover image: Siemens SIMATIC S7-300 industrial programmable controller, photographed by Ulli1105; representative equipment, not a photograph of the Natanz facility. Original photograph, CC BY-SA 2.5; resized for this site. Introduction In 2010, security researchers uncovered Stuxnet, a highly specialized piece of malware that became a landmark case in the history of cyber-physical conflict. Unlike conventional…