The rapid adoption of smart grids demands robust security and efficiency measures due to their critical role in delivering electricity and their potential for customer-oriented benefits. This paper presents an innovative framework, named RETINA, which provides a resilient and secure energy trading mechanism within smart grid systems. RETINA tackles the inherent security and infrastructure challenges in smart grids by establishing a trust-based security layer and facilitating energy transactions through blockchain technology. Our proposed solution integrates Public Key Infrastructure (PKI) and the Web of Trust (WoT) concepts, promoting decentralized communication channels and robust key management. We further introduce a smart contract-based energy trading mechanism that factors in trust, distance, and energy type (green or non-green) in cost calculation. The utility and robustness of RETINA have been validated in a virtualized testbed environment with 500 nodes, demonstrating superior performance in terms of scalability and resilience compared to the existing WoT scheme. Furthermore, RETINA successfully enables a secure and efficient energy trading scheme, promoting the use of renewable energy sources. Future enhancements will include application to a realistic smart grid deployment and the integration of additional functionalities. This groundbreaking solution has the potential to revolutionize the smart grid ecosystem, addressing its current limitations and propelling the industry towards a future of advanced and secure energy exchange.

翻译：摘要：智能电网的快速普及因其在电力输送中的关键作用及用户导向的潜在效益，对安全性与效率提出了严格要求。本文提出名为RETINA的创新框架，为智能电网系统提供具备韧性与安全性的能源交易机制。RETINA通过构建基于信任的安全层并借助区块链技术促进能源交易，解决了智能电网固有的安全与基础设施挑战。我们提出的解决方案整合了公钥基础设施（PKI）与信任网络（WoT）概念，推动去中心化通信渠道建设与稳健密钥管理。进一步引入基于智能合约的能源交易机制，在成本计算中综合考虑信任度、距离及能源类型（绿色或非绿色）。通过在包含500个节点的虚拟化测试环境中验证，RETINA在可扩展性与韧性方面展现出优于现有WoT方案的性能。此外，RETINA成功实现了安全高效的能源交易机制，促进了可再生能源的使用。未来改进将包括应用于实际智能电网部署并集成更多功能。这一突破性解决方案有望革新智能电网生态系统，突破当前局限，推动行业迈向先进安全的能源交换未来。