Climate change is one of our biggest challenges, and therefore the way we get our power has to change: The newest revision of the Netzentwicklungsplan constitutes for a large amount of additional renewables and our power grid will undergo a transformation. A greater interconnection is needed to efficiently use these resources, but what will happen in case of an error, false values or even an adversial attack? This talk aims to give an Idea about the smart grid and how such questions can be talked using open source software and data.