一种高度自适应的物理层密钥生成方案

doi:10.3969/j.issn.1001-2400.2018.04.016

西安电子科技大学学报

一种高度自适应的物理层密钥生成方案

沈志威;刘景美;韩庆庆

(西安电子科技大学综合业务网理论及关键技术国家重点实验室，陕西西安 710071)

收稿日期:2017-07-31 出版日期:2018-08-20 发布日期:2018-09-25
作者简介:沈志威(1993-)，男，西安电子科技大学硕士研究生，E-mail: shenzw@stu.xidian.edu.cn
基金资助:
国家自然科学基金资助项目(61671340)

Scheme for generation of a highly adaptive physical layer secret key

SHEN Zhiwei;LIU Jingmei;HAN Qingqing

(State Key Lab. of Integrated Service Networks, Xidian Univ., Xian 710071, China)

Received:2017-07-31 Online:2018-08-20 Published:2018-09-25

摘要/Abstract

摘要：

为了增强基于密钥的物理层安全的性能，提出了一个利用正交频分复用系统信道响应的高度自适应密钥生成方案。首先，采用线性最小均方误差估计，提高了生成密钥的一致性；其次，提出一种结合了离散余弦变换和交织技术的预处理方法，提高了密钥熵；再次，提出了一种高度自适应量化方法，包括保护间隔自适应、量化级数自适应以及量化门限自适应．仿真结果显示，在相同的散射环境下该方案生成的密钥的一致性以及随机性高于一般的密钥生成方案，验证了该方案的优越性．

关键词: 密钥生成, 正交频分复用, 线性最小均方误差, 交织, 高度自适应量化

Abstract:

To enhance the performance of the secret key-based mechanism of physical layer security, a scheme for generation of a highly adaptive key using the orthogonal frequency division multiplexing (OFDM) systems channel response is proposed. First, linear minimum mean square error (LMMSE) estimation is adopted to improve the agreement of the secret key. Second, a preprocessing method combining discrete cosine transform and weaving technology is proposed to improve the key entropy. Third, a highly adaptive quantization method is proposed, including the adaptation of the guard interval, the quantization level and the quantization threshold. Finally, simulation results show that the key agreement and randomness of this scheme is better than general schemes in the same scattering environment, thus verifying the superiority of this scheme.

Key words: key generation, orthogonal frequency division multiplexing (OFDM), linear minimum mean square error(LMMSE), weaving, highly adaptive quantization

沈志威;刘景美;韩庆庆. 一种高度自适应的物理层密钥生成方案[J]. 西安电子科技大学学报, 2018, 45(4): 86-91.

SHEN Zhiwei;LIU Jingmei;HAN Qingqing. Scheme for generation of a highly adaptive physical layer secret key[J]. Journal of Xidian University, 2018, 45(4): 86-91.

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一种高度自适应的物理层密钥生成方案

Scheme for generation of a highly adaptive physical layer secret key

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