A key new challenge of the energy in Europe is the decentralisation of its production. The development of solar panels and micro-cogeneration systems is a concrete example of this new change in the energy sector. As local energy management gains momentum, new energy and telecom technologies are driving real time metering and consumption monitoring in households, buildings and factories. These key drivers contribute to the second use case, aimed at understanding how the multi-agent theory can be effectively applied to a decentralised energy management system at a district scale, and provide a new structure to the energy market. Cyber security, therefore, will be a major input into the architecture devising of a system.