Internet of Things devices are responsible for collecting and transmitting data in smart cities, assisting smart cities to release greater potential. As Internet of Things devices are increasingly connected to smart cities, security and privacy have gradually become important issues. Recently, research works on mitigating security challenges of Internet of Things devices in smart cities mainly focused on authentication. However, in most of the existing authentication protocols, the trustworthiness evaluation of Internet of Things devices in smart cities is ignored. Considering the trustworthiness evaluation of Internet of Things devices is an important constituent of data source authentication, in this article, a cloud-aided trustworthiness evaluation mechanism is first designed to improve the credibility of the Internet of Things devices in smart cities. Furthermore, aiming at the problem that the user’s privacy is easy to leak in the process of authentication, an anonymous authentication and key agreement scheme based on non-interactive zero knowledge argument is proposed. The proposed scheme can ensure the privacy preservation and data security of Internet of Things devices in smart cities. The security analysis demonstrates that the proposed scheme is secure under q-SDH problem. The experimental simulation indicates that the performance of the proposal is greatly improved compared with other similar schemes.

物联网设备负责智慧城市数据的采集和传输，助力智慧城市释放更大的潜力。随着物联网设备越来越多地连接到智慧城市，安全和隐私逐渐成为重要问题。最近，减轻智慧城市物联网设备安全挑战的研究主要集中在身份验证上。然而，在现有的大多数认证协议中，忽略了对智慧城市物联网设备的可信度评估。考虑到物联网设备的可信度评估是数据源认证的重要组成部分，本文中，首次设计了云辅助可信度评估机制，以提高智慧城市中物联网设备的可信度。此外，针对用户隐私在认证过程中容易泄露的问题，提出了一种基于非交互式零知识论证的匿名认证与密钥协商方案。该方案可以保证智慧城市物联网设备的隐私保护和数据安全。安全性分析表明，该方案在q-SDH问题下是安全的。实验模拟表明，与其他类似方案相比，该方案的性能有了很大的提高。提出了一种基于非交互式零知识论证的匿名认证和密钥协商方案。该方案可以保证智慧城市物联网设备的隐私保护和数据安全。安全性分析表明，该方案在q-SDH问题下是安全的。实验模拟表明，与其他类似方案相比，该方案的性能有了很大的提高。提出了一种基于非交互式零知识论证的匿名认证和密钥协商方案。该方案可以保证智慧城市物联网设备的隐私保护和数据安全。安全性分析表明，该方案在q-SDH问题下是安全的。实验模拟表明，与其他类似方案相比，该方案的性能有了很大的提高。