| 摘要: |
| 针对无线信道生成密钥方法在信息协商中的信息泄露问题，提出了低信息泄露Cascade算法。通过构造传统Cascade协商过程的密钥协商过程矩阵，推导了合法用户所得密钥中安全的信息量，改进了Cascade算法；结合符号定时同步预处理以及高精度参数估计得到了一个完整的密钥生成方案。基于实测数据的分析结果表明，符号定时同步预处理能有效降低初始密钥不一致率；在协商成功率、密钥生成速率、密钥随机性、安全性等方面，低信息泄露Cascade协商算法与传统Cascade算法相比综合性能更优。 |
| 关键词: 保密通信 物理层安全 低信息泄露Cascade算法 信息协商 |
| DOI：10.20079/j.issn.1001-893x.221206003 |
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| 基金项目: |
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| A wireless channel key generation scheme based on low information leakage reconciliation algorithm |
| QIU Rui,XIE Shunqin,FAN Jing,XIE Nan,YANG Chen |
| (Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang 621999,China) |
| Abstract: |
| The low information leakage Cascade algorithm is proposed for the information leakage problem of information reconciliation in the wireless channel key generation scheme.By constructing the key reconciliation process matrix of the traditional Cascade reconciliation process,the amount of secure information in the key obtained by legitimate users is derived and the Cascade algorithm is improved.A complete key generation scheme is obtained by combining symbol timing synchronization preprocessing and high-precision parameter estimation.The analysis results based on the measured data show that the symbol timing synchronization preprocessing can effectively reduce the initial key disagreement rate,and the comprehensive performance of the low information leakage Cascade reconciliation algorithm is better that of traditional Cascade algorithm in terms of reconciliation success rate,key generation rate,key randomness,security,etc. |
| Key words: secure communication physical layer security low information leakage Cascade algorithm information reconciliation |
