一种改进Logistic混沌序列安全网络编码设计

针对多源组播带宽利用率较低和构造算法收敛时间过长的不足,提出了确定线性逐层构造算法.该方案只需通过一次试播,即可逐层构造各个编码节点的编码系数,并对出现数据冗余的链路进行修剪枝操作,最终使信宿端接收到的全局编码矩阵满秩,从而顺利解码.针对网络编码中的全局窃听攻击和污染攻击,从密码学角度出发,提出了一种基于混沌序列的安全网络编码方案,通过改进Logistic混沌序列对原始消息的最后一维数据进行加密,并利用m序列扰动混沌序列构造全局编码矩阵,实现将加密的原始信息与全局编码矩阵线性组合进行传输并在信宿端点构造线性列表,对污染信息进行过滤.通过仿真与数据分析可得:该方案提高了多源组播的通信效率,在抵抗全局窃听攻击的同时,还可以滤除污染信息,使网络的安全性进一步得到提高.

Safety network coding design based on improved Logistic chaotic sequence

To overcome the shortcomings of low bandwidth utilization and long convergence time of multi-source multicast, a linear layered construction algorithm is proposed. With only one trial broadcast, the coding coefficients of each coding node can be decoded layer by layer, and the link with data redundancy can be pruned to make the global coding matrix received by the sink end full rank, so as to decode smoothly. Aiming at eavesdropping attack and pollution attack in network coding, a secure network coding scheme based on chaotic sequence is proposed from the point of view of cryptography. Firstly, the logistic chaotic sequence is used to encrypt the last dimension data of the original message, and the global encoding matrix is constructed by using the m sequence to the chaotic sequence perturbation, Secondly, the original encrypted information is linearly combined with the global encoding matrix for transmission, and the sink node constructs a linear list to filter the contaminated information. The analysis shows that the scheme can improve the security of the network, resist global eavesdropping and filter out the polluting information, improve the transmission efficiency of the network.