摘要
针对光网络使用过程中下行通信数据传输至全部光网络单元内,提升非法用户窃取下行通信数据可能性的问题,以提升密钥安全性、确保光网络通信数据的安全为目的,研究基于信道相位信息的光网络动态加密方案。以小区参考信号为基础,采用最小二乘算法估算光网络导频位置的信道,获取信道频率响应估计值。采用基于信道相位的密钥提取方法,通过划分相位区域、选取密钥信息、相位与幅度量化等过程将光网络信道频率响应估计值转换成密钥比特,通过密钥合并获取密钥。通过一维Logistic混沌映射获取密钥流,利用密钥流对光网络通信下行数据实施异或加密和解密。实验结果显示,该方案所生成的动态密钥随着时间的改变而不断更新,加密方案所生成的密钥各检测项目所得评价值均高于0.01,且其中三个项目的评价值均能达到0.5以上,且具有较强的随机性,能显著提升光网络通信安全。
In order to improve the security of key and ensure the security of optical network communication data,a dynamic encryption scheme based on channel phase information is studied for optical network,aiming at the problem that downlink communication data is transmitted to all optical network units during the use of optical network and the possibility of illegal users stealing downlink communication data.Based on the cell reference signal,the least square algorithm is used to estimate the channel of the pilot position of the optical network,and the channel frequency response is estimated.The key extraction method based on channel phase is used to convert the estimated frequency response of optical network channel into key bits through the process of phase region division,key information selection,phase and amplitude quantization,and the key is acquired through key combination.The key stream is obtained by one-dimensional Logistic chaotic mapping,and xOR encryption and decryption are performed for downlink data in optical network.The experimental results show that the dynamic key generated by this scheme is constantly updated with the change of time.The evaluation values of each detection item of the key generated by this encryption scheme are higher than 0.01,and the evaluation values of three items can reach more than 0.5,which has strong randomness and significantly improves the communication security of optical network.
作者
蒋欣欣
孔婷
JIANG Xinxin;KONG Ting(Yuzhang Normal University,Nanchang 330103,China)
出处
《激光杂志》
CAS
北大核心
2023年第4期119-123,共5页
Laser Journal
基金
江西省教育厅科学技术研究课题果(No.GJJ191213)。
关键词
信道相位
光网络
动态加密
小区参考信号
信道频率响应
密钥流
channel phase
optical network
dynamic encryption
cell reference signal
channel frequency response
the key stream
