量子电子学报2018，Vol.35Issue(1)：115-121,7.DOI:10.3969/j.issn.1007-5461.2018.01.018
相干扩时光码分多址系统的物理层安全性研究
Physical-layer security of coherent time-spreading optical code division multiple access system
摘要
Abstract
The physical-layer security of coherent time-spreading optical code division multiple access (OCDMA) system is analyzed quantitatively from the view of security of information theory.Relationships between the system security capacity and different system parameters are obtained.The wiretap channel model of OCDMA system is established,and the system security capacity is calculated.Influences of key system parameters (user number M,input optical power P and code length N) on the physical-layer security of coherent time-spreading OCDMA system are examined by using Gold code as an example.Results show that the coherent time-spreading OCDMA system has a very good physical-layer security against fiber tapping attacks,and the above key system parameters have important influences on improving the system physical-layer security.It can improve the security of coherent time-spreading OCDMA system by choosing the appropriate system parameter values.关键词
光通信/光码分多址/窃听信道模型/保密容量/Gold码Key words
optical communications/optical code division multiple access/wiretap channel model/secrecy capacity/Gold code分类
信息技术与安全科学引用本文复制引用
谭业腾,蒲涛,项鹏,方涛,焦海松,朱华涛..相干扩时光码分多址系统的物理层安全性研究[J].量子电子学报,2018,35(1):115-121,7.基金项目
Supported by National Natural Science Foundation of China(国家自然科学基金,61475193,61504170),Natural Science Foundation of Jiangsu Province(江苏省自然科学基金,BK20140069) （国家自然科学基金,61475193,61504170）
