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Research on the Dynamic Firewall of the Internet of Things

Using the fingerprint characteristics of the wireless channel, a dynamic key system based on user location is designed and implemented. A new security dimension of “location” is added to the Internet of things. While the user communicates with the Internet of things device normally, the channel characteristics are extracted. After quantization, negotiation, and privacy amplification, the dynamic key coupled with the user's location in real-time, that is, the location key is generated. Different from the traditional identity key, the key comes from the wireless channel and has the characteristics of no distribution, dynamic change, and compatibility with the existing key security system. A dynamic “firewall” is built between users and Internet of things devices. As long as the location of legitimate users is different from that of illegal users, they resist active attacks by illegal users in unknown locations. The control link of the UAV is developed, and the “fixed-point control” UAV is realized.