Research on Key Agreement Security Technology Based on Power Grid Internet of Things

With the rapid development of information technology, the Power grid Internet of Things technology has been integrated into all aspects of life. The intelligent network formed by the Power grid Internet of Things that interconnects people, things and things has greatly promoted the intelligent development in various fields. However, due to the large number of IoT devices and the limited resources of many devices, it has brought huge challenges to the protection of IoT information data and device management. This paper proposes a lightweight and secure IoT authentication key agreement protocol for the problems in the IoT environment. The protocol adds identity authentication based on the ECDH algorithm to prevent man-in-the-middle attacks. The identity authentication part is designed based on the dynamic password technology with hash as the main operation, and realizes the mutual authentication of the dynamic password based on the identification. The entire protocol has good security and can effectively resist man-in-the-middle, impersonation, eavesdropping, and replay attacks, ensuring the security of IoT device communications. At the same time, the protocol resource overhead is small, and it can adapt to resource-limited IoT devices. In addition, the authentication mechanism combined with cloud-edge-end collaboration can efficiently manage many IoT devices.