CAJ | 학술논문

无线信道具有互易性( Reciprocity )、时变( Temporal Variations )特性和空变( Spatial Varia-tions)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。
무선신도구유호역성( Reciprocity )、시변( Temporal Variations )특성화공변( Spatial Varia-tions)특성，저사특성위통신쌍방종무선신도중제취안전적공향밀약제공료가능，유효적밀약제취궤제능구현저지제고밀약제취속솔。재과거적30다년중，무선신도밀약제취경력료종부한우이론도실제신도밀약제취적발전과정。문중종신도삼수선취、양화기술、신식협상기술、비밀증강기술등각도대기우무선신도특성적밀약제취체제적연구현상、분류비교、발전추세진행료전면개술。
Wireless channel enjoys the properties of reciprocity,temporal variations and spatial variations. These properties enable the legitimate partners to share secret key from the wireless channel. And effective secret-key extraction system could remarkably improve the key extraction rates. In the past three decades, the secret-key extraction technique has experienced the development process from theory study to practical experiments in real channel. From the aspects of channel-parameter choice, quantization, information ne-gotiation and privacy enhancement techniques, this paper provides a comprehensive overview on current status, classified comparison and development trend of secret-key extraction techniques based on wireless channel characteristics.