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无线信道具有互易性(Reciprocity)、时变(Temporal Variations)特性和空变(Spatial Variations)特性,这些特性为通信双方从无线信道中提取安全的共享密钥提供了可能,有效的密钥提取机制能够显著地提高密钥提取速率。在过去的30多年中,无线信道密钥提取经历了从仅限于理论到实际信道密钥提取的发展过程。文中从信道参数选取、量化技术、信息协商技术、秘密增强技术等角度对基于无线信道特性的密钥提取体制的研究现状、分类比较、发展趋势进行了全面概述。
Reciprocity, Temporal Variations and Spatial Variations are the characteristics of wireless channels. These features make it possible for both communication parties to extract a secure shared key from the wireless channel. Effective key extraction The mechanism can significantly improve the rate of key extraction. Over the past 30 years, wireless channel key extraction has gone through from the theory to the actual channel key extraction of the development process. In this paper, we present a comprehensive overview of the research status, classification and comparison, and development trend of the key extraction system based on wireless channel characteristics from the aspects of channel parameter selection, quantization techniques, information negotiation techniques, and secret enhancement techniques.