In recent years, unprecedented work has been done in the area of smart cities. The purpose of developing smart cities is to enhance quality of life factors for people dwelling within them. To achieve that purpose, technologies such as IoT and cloud computing have been utilized. Blockchain technology is also among the promising technologies that can offer countless valuable services to its end users. It is a immutable programmable digital register for the purpose of recording virtual assets having some value and was primarily developed for digital currencies like Bitcoin. To fully utilize the services of blockchain technology within smart cities, characteristics of blockchain technology, and its key requirements and research challenges need to be identified. Hence, in this article, an attempt has been made to identify the characteristics of blockchain technology. Furthermore, indispensable requirements for incorporating blockchain technology within smart cities are enumerated. A conceptual architecture for securing smart city using blockchain technology is proposed and explained using a possible use case study. An overview of a real-world three-blockchain- based smart city case study is also presented. Finally, several imperative research challenges are identified and discussed.

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通过区块链技术保护智慧城市：架构，需求和挑战

近年来，在智慧城市领域已经完成了前所未有的工作。发展智慧城市的目的是提高居住在其中的人们的生活质量。为了实现该目的，已经利用了诸如物联网和云计算之类的技术。区块链技术也是有前途的技术之一，可以为其最终用户提供无数有价值的服务。它是一个不变的可编程数字寄存器，用于记录具有一定价值的虚拟资产，并且主要针对比特币等数字货币而开发。为了在智慧城市中充分利用区块链技术的服务，需要确定区块链技术的特点及其关键要求和研究挑战。因此，在本文中，试图识别区块链技术的特征。此外，列举了将区块链技术纳入智慧城市的必不可少的要求。提出并使用可能的用例研究说明了使用区块链技术保护智慧城市的概念架构。还概述了基于现实世界的三块链的智慧城市案例研究。最后，确定并讨论了几个必要的研究挑战。还概述了基于现实世界的三块链的智慧城市案例研究。最后，确定并讨论了几个必要的研究挑战。还概述了基于现实世界的三块链的智慧城市案例研究。最后，确定并讨论了几个必要的研究挑战。