中国光学（中英文）2024，Vol.17Issue(5)：1219-1226,8.DOI:10.37188/CO.2023-0202
大气多输入-多输出光信道共享密钥提取研究
Shared secret-key extraction from atmospheric MIMO optical channel
摘要
Abstract
Shared secret-key extraction from random channel characteristics is an effective approach to ensur-ing the physical layer security of atmospheric optical channels.The secret-key generation rate and disagree-ment rate are two issues that attract a lot of attention.Using the random characteristics of atmospheric turbu-lent optical channels as a shared source of randomness,a secret-key extraction scheme for multiple-input multiple-output(MIMO)atmospheric optical channels is proposed.The alternative singular value decomposi-tion is used to decompose the channel matrix;the correlation between the two channel characteristic se-quences obtained by the two legitimate parties is enhanced through a simple moving average,and the single-threshold interleaved quantization is performed on the channel characteristic sequences after moving average.The two legitimate parties generate random controlling sequences for coding mapping based on differential diversity values,in order to implement encoding mapping for the single threshold interleaved quantization results of the channel characteristic sequences.The experimental results show that our scheme's initial key disagreement rate can reach 4.5×10-5 at a signal-to-noise ratio of 30 dB,and that the generated random bit se-quences have passed the National Institute of Standards and Technology(NIST)randomness test.The results are useful in the implementation of secret-key extraction from atmospheric MIMO optical channels.关键词
MIMO/光信道/大气湍流/密钥提取/量化Key words
MIMO/optical channel/atmospheric turbulence/secret-key extraction/quantization分类
信息技术与安全科学引用本文复制引用
陈纯毅,蔡锦湘,李琼..大气多输入-多输出光信道共享密钥提取研究[J].中国光学（中英文）,2024,17(5):1219-1226,8.基金项目
国家自然科学基金资助项目(No.62275033) （No.62275033）
重庆市自然科学基金项目(No.cstc2021jcyj-msxmX0457) Supported by the National Natural Science Foundation of China(No.62275033) （No.cstc2021jcyj-msxmX0457）
the Natural Science Founda-tion of Chongqing City of China(No.cstc2021jcyj-msxmX0457) （No.cstc2021jcyj-msxmX0457）
