A Multi-Stage Information Protection Scheme for CDA-Based Energy Trading Market in Smart Grids

Building a reliable information exchange scheme is the prerequisite for Peer-to-Peer (P2P) energy trading in the smart grid. This paper proposes a multi-stage information protection scheme to meet the data security requirements including personal privacy-preserving, message authentication and confidentiality. In this study, the adversary is supposed to attack the continuous double auction (CDA)-based energy trading system in both the bidding period and implementation period. To prevent the smart grid from all potential cyber-attacks, our protection scheme is proposed to deal with personal privacy leakage, malicious data injection and impersonation attack. Before the trading period, in the home energy data collection stage, we propose a dual privacy-preserving scheme based on the short key homomorphic encryption and the decentralized framework. In the trading period, an encryption-signature mixed (E-S) communication model is proposed to achieve the secure transmission of trading messages (e.g., energy bidding from prosumer). At last, in the implementation period, a decentralized field measurement monitoring scheme is proposed to detect the node compromise attack to the power measurements. In addition, the computational feasibility, time cost and communication cost are evaluated with the home-use PC. The anti-attack performance of the proposed scheme is verified on the IEEE 39-bus distribution network with the CDA-based P2P energy trading market.