Cloud and cyber security in critical energy applications – Digitalization and IoT is a clear trend within power plants and substations, just as it is in industrial automation. The Smart Grid is certainly a driving factor, but there are also other reasons for this change. Operators often find that only having data available in the control room is insufficient. Instead, they want to monitor transformers remotely, implement new maintenance concepts from anywhere, optimize utilization and commissioning, or retrieve environmental data online.