Abstract
Global openness of battlefield network makes it face many security threats, the physical security technology can provide an important support to traditional security system and strong protection to messages transmission, studying its application in battlefield network is of great significance. In view of the current and future network development trend, this paper studies the physical layer security problem from the perspective of battlefield network under modern warfare conditions, summarizes and analyzes the basic model of physical layer security, sorts out and introduces the physical layer security technology of wireless communication, and finally summarizes the risks and challenges still faced by the physical layer of the current battlefield network.
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