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Cyber attacks is monitored, but the data traffi c. Data is constantly buzzing back and forth in the Pyrmont public util- Public utilities in sight ity network; control systems transmit measured values, smart meters report power consumption, sensors send water levels. This data communica- tion is fi rst recorded and “learned” by IRMA. “This is the real work for us,” says Thorsten Hamann. “We have to ‘teach’ IRMA the individual commu- nication partners and virtually register them. Once October More than 2019 150 Attack Langenfeld Public Utilities cyber attacks on critical in- frastructure reported in 2018 September By IRMA is smart enough, the system knows which activities are normal. And most importantly, she’ll know if there are any anomalies. For example, when a controller starts to communicate not just with the control room but also with other control- lers in the network. Or a network participant estab- lishes a connection to the Internet that isn’t one 2019 Attack Stuttgart Public Utilities 2032 more than 40 million smart meter gateways will be installed in Germany of their tasks. “Then IRMA will sound the alarm and alert us to any malfunctions. But IRMA always stays in the background. She’s a purely a monitor- ing system, and therefore has no impact on our ac- tive systems.” We get to know our network For Frank Jakob and his colleagues, this is one of the main advantages of the system. But there is also a very pleasant side effect, as Thorsten Hamann de- scribes: “With IRMA, we’ve gotten to know our own network in a completely new way. Only IRMA has shown us who actually communicates with whom. And from this knowledge, IRMA conjures up a con- stantly updated network plan for us, which is im- portant for the upcoming round of certifi cation. At the push of a button.” (lo)  stadtwerke-bad-pyrmont.de Center photo: Have everything in view and alert the technicians if necessary: Thorsten Hamann and Frank Jakob This pump is really still running. And it’s remotely monitored! 17