This article presents an overview of the literature on privacy protection in smart meters with a particular focus on homomorphic encryption (HE). Firstly, we introduce the concept of smart meters, the context in which they are inserted the main concerns and oppositions inherent to its use. Later, an overview of privacy protection is presented, emphasizing the need to safeguard the privacy of smart-meter users by identifying, describing, and comparing the main approaches that seek to address this problem. Then, two privacy protection approaches based on HE are presented in more detail and additionally we present two possible application scenarios. Finally, the article concludes with a brief overview of the unsolved challenges in HE and the most promising future research directions.

中文翻译：

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使用同态加密的智能电表隐私保护：概述

本文概述了有关智能电表隐私保护的文献，特别关注同态加密 (HE)。首先，我们介绍了智能电表的概念，它们被插入的背景是其使用所固有的主要关注点和反对意见。随后，概述了隐私保护，强调需要通过识别、描述和比较寻求解决此问题的主要方法来保护智能电表用户的隐私。然后，更详细地介绍了两种基于 HE 的隐私保护方法，另外我们介绍了两种可能的应用场景。最后，文章最后简要概述了 HE 中尚未解决的挑战以及未来最有希望的研究方向。