A Novel Physical Layer Encryption Algorithm Based on Statistical Characteristics of Time-Selective Channels
A Novel Physical Layer Encryption Algorithm Based on Statistical Characteristics of Time-Selective Channels
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DOI：
10.1109/access.2018.2854305
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发表时间：
2018
期刊：
影响因子：
3.9
通讯作者：
Jingyu Hua;Shengyuan Jiang;Weidang Lu;Zhijiang Xu;Feng Li
中科院分区：
文献类型：
--
作者：
Jingyu Hua;Shengyuan Jiang;Weidang Lu;Zhijiang Xu;Feng Li
目前，物理层信息的安全问题备受关注。然而，这种物理层安全性的传统研究依赖于上行和下行信道之间的互易性假设。这一假设在移动通信的时间选择信道中无法得到保证。为此，本文提出了一种移动通信中的加密算法。首先，提取时间选择信道的统计量作为多个混沌发生器的种子；其次，将生成的混沌序列组合生成密码。最后，通过简单的置乱操作对物理信号进行加密。通过计算机仿真验证了所提出的算法，结果表明合法接收端可以成功恢复加密后的数据，而嗅探器在较宽的信噪比范围内产生较差的平坦误码率。
Currently, the security of information in the physical layer has attracted much attentions. However, such a physical layer security of conventional study depends on the assumption of reciprocity between the uplink and downlink channels. This assumption cannot be ensured in the time-selective channel of mobile communications. Hence, this paper proposes an encryption algorithm in mobile communications. First, the statistics of time-selective channel are extracted to act as the seeds for multiple chaos generator. Second, the produced chaos sequences are combined to produce the secret code. Finally, the physical signal is encrypted by the simple scrambling operation. We verify the proposed algorithm by computer simulations, and the results demonstrate that the encrypted data can be successfully recovered by the legal receiver, while the sniffer produces poor and flat bit-error-rate performance in a wide range of signal-to-noise ratios.