A Novel Cryptography-Based Architecture to Achieve Secure Energy Trading in Microgrid

With the advancement of distributed generation and information technology, energy trading in micro grid (MG) becomes popular in recent years. However, due to the lack of authority management in the MG, the traditional energy trading method with trusted system operator (SO) and market operator (MO) is no longer suitable. This paper proposes a novel, secure and privacy-preserving energy trading architecture with the state-of-the-art cryptosystem. Firstly, a zero-knowledge-proof based non-interactive protocol is proposed to authenticate prosumers. Next, a novel energy data evaluation method is proposed to achieve privacy-preserving power pricing and dispatching with the homomorphic encryption. Moreover, a lightweight tree-chained trading book is proposed to protect the transaction information. Then, we analysis the security performance and emphasize the advantages of our proposed architecture. At last, we exam the performance of our proposed methods in the IEEE benchmark systems. We observe that, our proposed architecture could achieve the privacy-preserving and secure energy trading in a low-time-cost but high-accuracy way.