*Article* **A Novel Privacy Preserving Scheme for Smart Grid-Based Home Area Networks**

**Wajahat Ali 1, Ikram Ud Din 1,\*, Ahmad Almogren 2 and Byung-Seo Kim 3,\***

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**Abstract:** Despite the benefits of smart grids, concerns about security and privacy arise when a large number of heterogeneous devices communicate via a public network. A novel privacypreserving method for smart grid-based home area networks (HAN) is proposed in this research. To aggregate data from diverse household appliances, the proposed approach uses homomorphic Paillier encryption, Chinese remainder theorem, and one-way hash function. The privacy in Internet of things (IoT)-enabled smart homes is one of the major concerns of the research community. In the proposed scheme, the sink node not only aggregates the data but also enables the early detection of false data injection and replay attacks. According to the security analysis, the proposed approach offers adequate security. The smart grid distributes power and facilitates a two-way communications channel that leads to transparency and developing trust.

**Keywords:** aggregation; authentication; key management; privacy; smart home; smart meter
