基于区块链的物联网访问控制系统

随着5G技术广泛应用和物联网技术飞速发展，可以预见的是物联网设备的数量和连接规模会进一步扩大。物联网可以有效地利用现有网络基础设施将物理世界和互联网世界联系在一起，从而实现设备之间的数据共享，然而，其网络结构的大规模性和复杂性给物联网系统带来了潜在的安全风险。访问控制技术可以用来保护设备以及设备上数据的安全，传统访问控制模型及实现比较复杂且中心化的，由此，本文期望构建一种新型的基于区块链的物联网访问控制系统——基于RBAC模型和ABAC模型构建DARBAC模型，同时结合区块链技术构建访问控制系统以克服集中式实体的单点故障问题，具备可伸缩性、轻量级和细粒度等特性。实验测试结果表明，该系统具有良好的并发性能，可在物联网系统中有效地部署实施并能达到预期效果。

Internet of Things Access Control System Based on Blockchain

With the widespread application of 5G technology and the rapid development of IoT technology, it is foreseeable that the number of IoT devices and the scale of connections will further expand. The Internet of Things can effectively use the existing network infrastructure to connect the physical world and the Internet world to achieve data sharing between devices. However, the large-scale and complexity of its network structure brings potential security risks to the Internet of Things system. Access control technology can be used to protect the security of the device and the data on the device. The traditional access control model and implementation are more complex and centralized. Therefore, this article expects to build a new type of blockchain-based Internet of Things access control system： Based on the RBAC model and the ABAC model, the DARBAC model is proposed, and the access control system is built in conjunction with the blockchain technology to overcome the single-point failure problem of centralized entities. It has the characteristics of scalability, lightweight, and fine-grained. Experimental test results show that the system has good concurrency performance, can be effectively deployed and implemented in Internet of Things system and can achieve the expected results.