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

Abstract

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

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.

References

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Scheme for generation of a highly adaptive physical layer secret key

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