The purpose of the study is to meet the more needs of the future social development for the Internet of things (IoT) and make IoT better provide more convenience for people and reduce the risk of data leakage in the IoT system. Starting with the IoT edge devices, the centralized and distributed hit rate and average corresponding speed of the edge nodes are studied. Meanwhile, the gateway security of the edge devices designed is discussed to obtain a more reliable gateway. The research results show that the Max-PSN cache algorithm proposed in this article is superior to the other two algorithms in terms of hit rate and average response speed of centralized and distributed fog systems, which shows the effectiveness of the cache algorithm. The gateway designed shows good randomness through frequency detection and poker detection, which can effectively resist attacks, thus ensuring the security of the gateway. Therefore, the research on the security of the IoT edge devices plays a positive role in reducing the risk of data leakage and the wide application of the IoT system.

中文翻译：

---

物联网边缘设备的安全

研究的目的是为了满足未来社会发展对物联网（IoT）的更多需求，让物联网更好地为人们提供更多便利，降低物联网系统中数据泄露的风险。从物联网边缘设备入手，研究边缘节点的集中分布式命中率和平均对应速度。同时，讨论了设计的边缘设备的网关安全性，以获得更可靠的网关。研究结果表明，本文提出的Max-PSN缓存算法在集中式和分布式雾系统的命中率和平均响应速度方面均优于其他两种算法，显示了该缓存算法的有效性。设计的网关通过频率检测和扑克检测显示出良好的随机性，可以有效抵御攻击，从而保证网关的安全。因此，物联网边缘设备的安全性研究对于降低数据泄露风险和物联网系统的广泛应用具有积极的作用。