PARIS — Cyberattacks affecting supermarket refrigeration systems in several European countries on Monday highlighted the risks associated with connecting industrial equipment to the internet. After a previous attack in France in October, several chains in Belgium, Estonia, Finland, Ireland, Luxembourg, the Netherlands and Sweden experienced stark rises in fridge and freezer temperatures on Monday, forcing them to throw away spoilt produce. Real world effects Industrial equipment such as refrigeration systems, once operated largely offline, is now commonly connected to the internet so it can be monitored and managed remotely, cybersecurity specialists including Antoine Hautin, secretary-general of the Almond cybersecurity consultancy, told AFP. That connectivity can also provide an avenue for attackers to interfere with physical systems through digital networks. In France, the attackers targeted the fridge regulation system made by the Danish firm Danfoss, which is used by many shops. "Most of the time, that's done through a web interface. You connect to it with a password and you then ha