| 准静态场景下基于智能超表面的密钥生成方法 |
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| 作者姓名： | 郝一诺 金梁 黄开枝 肖帅芳 |
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| 作者单位： | 信息工程大学，河南 郑州 450001 |
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| 基金项目： | 国防科技创新特区;国家自然科学基金(61871404)。 |
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| 摘 要： | 针对物联网准静态场景中信道变化缓慢、密钥速率低的问题，提出了一种基于智能超表面（RIS， reconfigurable intelligent surface）的密钥生成方法。首先，利用RIS的捷变特性构造快速变化的信道；然后，基站（BS，base station）与合法用户通过信道估计、量化、信息协商等步骤从信道信息中提取对称密钥；最后，对相干时间内密钥生成和数据传输进行最优时间分配，实现最大传输速率的“一次一密”。仿真结果表明，所提方法的密钥速率高于现有的中继辅助、随机信号流和随机数方法，并且随着RIS反射单元个数和相干时间内信道估计次数的增加，密钥速率有进一步的提高。
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| 关 键 词： | 物理层安全 密钥生成 智能超表面 准静态场景 |
Key generation method based on reconfigurable intelligent surface in quasi-static scene |
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| Authors: | HAO Yinuo JIN Liang HUANG Kaizhi XIAO Shuaifang |
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| Affiliation: | Information Engineering University, Zhengzhou 450001, China |
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| Abstract: | Aiming at the problems of slow channel changes and low key generation rate in IoT quasi-static scenarios,a key generation method based on reconfigurable intelligent surface(RIS)was proposed.First,the agility characteristics of RIS was used to construct a fast-changing channel.Then,the base station and legitimate users extracted a consistent key from the channel information through channel estimation,conversion,and information negotiation.Finally,optimal time allocation for data transmission and key generation in the coherent time to achieve the maximum transmission rate of one-time pad.The simulation results show that the key generation rate of proposed method is higher than that of the existing relay-assisted method,random signal flow method and random number method,and as the number of RIS reflection units and frequency of channel estimation in the coherence time increase,the key generation rate will be further improve. |
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| Keywords: | physical layer security key generation reconfigurable intelligent surface quasi-static scene |
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