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Peer-to-Peer (P2P) electricity transaction is an emerging power trading model, which can effectively solve the drawbacks of traditional power trading that requires the exist of intermediaries. As the application spreads, P2P electricity transaction faces some regulatory issues. At present, some existing regulatory models are based on centralized trusteeship centers. There is no distributed regulatory mechanism, and no dynamic addition and deletion mechanism to prevent malicious collusion of regulators. In this article, we propose a multi-party audit and regulatory mechanism for P2P electricity transaction, which is based on a dynamic distributed traceable linkable group signature (DDT-LGS) scheme. This solution realizes the distributed trace and audit for P2P electricity transaction, and further realizes the dynamic permission of regulators to join and exit. We give the system architecture of multi-party audit and regulatory mechanism, formally define the algorithm process, and give a specific DDT-LGS construction. Security and performance analysis shows that the proposed scheme holds strong security, more comprehensive functions and better performance, that is suitable for P2P power trading scenarios.

Multi-party Audit and Regulatory Mechanism for P2P Electricity Transaction based on Distributed Traceable Linkable Group Signature