Nowadays, the development of the Internet of Things (IoT) has received much attention from both industry and academia. Sensors and devices connected to the IoT network can conveniently gather and collect information for further usage and analysis by IoT users. However, a large quantity of data produced by IoT devices contain sensitive information, which leads to many challenging security issues in IoT systems. The most important one is how to efficiently and securely share IoT data with valid IoT users while forbidding others from obtaining the data. In this article, we propose a cryptographic method to protect the privacy of IoT data while maintaining the functionality of efficient data sharing and user revocation. Our solution relies on a revocable attribute-based encryption (ABE) scheme to encrypt IoT data. The ABE technique makes fine-grained access control available on the encrypted IoT data, while the revocation technique makes invalid users unable to access future encrypted IoT data. To alleviate the issue of resource limitation of IoT devices, we involve a cloud-assisted data sharing and user revocation technique. Finally, we experimentally tested our scheme, and the performance evaluation results demonstrate the practice of our solution scheme.

中文翻译：

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物联网中具有有效用户撤销功能的基于云的基于属性的数据共享

如今，物联网（IoT）的发展受到了业界和学术界的广泛关注。连接到IoT网络的传感器和设备可以方便地收集和收集信息，以供IoT用户进一步使用和分析。但是，物联网设备产生的大量数据包含敏感信息，这导致物联网系统中许多具有挑战性的安全问题。最重要的是如何与有效的IoT用户高效安全地共享IoT数据，同时禁止其他人获取数据。在本文中，我们提出了一种加密方法，可在保持有效数据共享和用户撤销功能的同时保护IoT数据的隐私。我们的解决方案依靠可撤销的基于属性的加密（ABE）方案来加密IoT数据。ABE技术使对加密的IoT数据可以使用细粒度的访问控制，而吊销技术使无效的用户无法访问将来的加密的IoT数据。为了缓解物联网设备的资源限制问题，我们涉及一种云辅助数据共享和用户吊销技术。最后，我们通过实验测试了我们的方案，性能评估结果证明了我们的解决方案的实践。