Future energy grids will make extensive use of the integration of ICT technologies. Thus, cyber security risks become a threat even for energy suppliers. Numerous security issues are completely unsolved today, because these special environments require novel security mechanisms and processes. The aim of the project (SG)² is therefore a systematic study of smart grid technologies in terms of ICT security issues and the research of countermeasures. Based on a thorough threat and risk analysis from a state-level perspective and security analysis of Smart Grid components, (SG)² explores measures for power grid operators that serve to increase the security of computer systems deployed in the future critical infrastructure of "energy".