Secure data aggregation has been widely studied in the area of the smart grid. Many existing schemes have studied protecting user's privacy in data aggregation by using advanced cryptographic tools. However, they usually introduce a large computation burden to smart meters in limited computing power or require a trusted authority. How to ensure the efficiency on the user side while preserving user's privacy still has not been well addressed. In this article, we consider the scenario where there does not exist a trusted authority and users in the smart grid may dynamically change, and propose an efficient and robust data aggregation scheme without a trusted authority for the smart grid. Our proposed scheme not only ensures user's privacy and efficiency but also supports flexible dynamic user management with no need of involving a trusted authority. Analysis of security and performance shows that our scheme can guarantee stronger security features, while ensuring efficiency in terms of computation, communication, and storage overhead.

中文翻译：

---

一种没有可信权威的智能电网高效、稳健的数据聚合方案


安全数据聚合在智能电网领域得到了广泛的研究。许多现有方案已经研究通过使用先进的加密工具来保护数据聚合中的用户隐私。然而，它们通常会给计算能力有限的智能电表带来巨大的计算负担，或者需要可信的权威。如何在保护用户隐私的同时保证用户侧的效率仍然没有得到很好的解决。在本文中，我们考虑了智能电网中不存在可信机构且用户可能动态变化的场景，并提出了一种高效、鲁棒的智能电网无可信机构数据聚合方案。我们提出的方案不仅保证了用户的隐私和效率，而且支持灵活的动态用户管理，无需涉及可信机构。安全性和性能分析表明，我们的方案可以保证更强的安全特性，同时保证计算、通信和存储开销方面的效率。