The increasing use of smart metering infrastructure invites security threats through trusted insiders in spite of the devices’ authentication phase. Trusted insiders equipped with high privilege are also become vulnerable to being attacked. In the presence of these malicious or compromised insiders, it becomes difficult to achieve an efficient, transparent, reliable, and cost-effective smart grid. Addressing the issues arising from an insider attack, we explore post-authentication attacks and present a reputation score-based model using blockchain technology. The reputation of a device is computed based on the neighbor’s opinion. The opinions and incentives are stored on a blockchain to ensure integrity, availability, and decentralization. We analyze the latency of the proposed model by modifying the open-source Go Ethereum and security effectiveness through a reputation simulator. In addition to this, storage, communication, resource usage overhead, and security requirements are also analyzed to prove the efficiency of the proposed model for the lightweight smart metering infrastructure.

尽管设备处于身份验证阶段，但越来越多地使用智能计量基础设施会通过受信任的内部人员引发安全威胁。拥有高特权的可信内部人员也容易受到攻击。在存在这些恶意或受到损害的内部人员的情况下，实现高效、透明、可靠且具有成本效益的智能电网变得困难。针对内部攻击引起的问题，我们探索了身份验证后攻击，并使用区块链技术提出了一个基于声誉评分的模型。设备的声誉是根据邻居的意见计算的。意见和激励措施存储在区块链上，以确保完整性、可用性和去中心化。我们通过声誉模拟器修改开源 Go Ethereum 和安全有效性来分析所提出模型的延迟。除此之外，还分析了存储、通信、资源使用开销和安全要求，以证明所提出的轻量级智能计量基础设施模型的效率。