Performance analysis of physical-layer security in an OCDMA-based wiretap channel

Performance analysis of physical-layer security in an OCDMA-based wiretap channel
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基于 OCDMA 的窃听通道中物理层安全的性能分析

DOI:
10.1364/jocn.9.000813
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发表时间:
2017-10
影响因子:
5
通讯作者:
Xu Ming
Xu Ming
中科院分区:
计算机科学1区
文献类型:
--
作者:
Ji Jianhua;Zhang Guirong;Li Wenjun;Sun Lu;Wang Ke;Xu Ming

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基于信息安全理论,分析了光码分多址(OCDMA)系统的物理层安全问题。首次采用安全泄漏系数来评价物理层的安全级别,采用安全接收距离来衡量安全传输范围。通过建立相干OCDMA系统的窃听信道模型,定量分析了提取位置、提取比例、活跃用户数和码长对物理层安全性的影响。在满足合法用户误码率和安全泄漏系数的前提下,对相干OCDMA系统的物理层安全性和可靠性进行了评价。仿真结果表明,为了满足合法用户的可靠性和安全性,用户数量必须保持在一定的间隔内。此外,通过增加编码长度可以提高基于ocdma的相干窃听信道的安全性能。
Based on information-theoretic security, physical-layer security in an optical code division multiple access (OCDMA) system is analyzed. For the first time, the security leakage factor is employed to evaluate the physicallayer security level, and the safe receiving distance is used to measure the security transmission range. By establishing the wiretap channel model of a coherent OCDMA system, the influences of the extraction location, the extraction ratio, the number of active users, and the length of the code on the physical-layer security are analyzed quantitatively. The physical-layer security and reliability of the coherent OCDMA system are evaluated under the premise of satisfying the legitimate user’s bit error rate and the security leakage factor. The simulation results show that the number of users must be in a certain interval in order to meet the legitimate user’s reliability and security. Furthermore, the security performance of the coherent OCDMA-based wiretap channel can be improved by increasing the code length.
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