Currently, much effort is being made on a European and global level, to push towards realizing a sustainable development of the Smart Grid, with the minimum vulnerability to external attacks or to malicious Smart Grid nodes. Utility companies globally invest in an efficient, controlled and flexible distribution of the energy to optimize the services they provide to the end customers. On the other hand, individual clients call for more efficient Smart Grid solutions with guaranteed highly secure Demand Response services that could reduce their electricity bill without sacrificing their privacy or their energy-consuming habits. In this paper, we present the SealedGRID that provides an innovative platform that abides by the existing standardization work and is directly utilized by the shareholders to provide new tools towards a scalable, highly trusted, and interoperable Smart Grid security platform.