改进的混沌序列非结构化P2P网络编码

Unstructured P2P Network Coding Based on Improved Chaotic Series

针对传统编码方法在非结构化P2P网络编码中误码率高,抗窃听和污染攻击能力弱的问题。提出一种改进的Rossler混沌序列编码算法。融合了列表译码法思想,利用随机数生成器构建Rossler扰动搜索数据矩阵,在信宿处采用列表译码编码方案,利用Rossler扰动搜索数据矩阵实现了一次一密的编码体制。以梯度下降信息作为局部搜索器来调整非结构化P2P网络编码的权值,实现全局寻优和空间智能搜索。引入混沌序列密钥信息实现信宿译码,降低加密信息的带宽占用率,同时减小了对编码向量分配限制。仿真实验表明,该编码算法误码率低,不需要额外的安全信道,通信效率高,能够有效抵抗强度污染攻击,非常适合非结构化P2P网络保密通信。

In view of the traditional coding method in unstructured P2P network coding has the high error rate, anti wiretap-ping and attack ability is weak. An improved Rossler chaotic series coding algorithm was proposed. List decoding method was used. Random number generator was used to construct the Rossler perturbation search data matrix. Using the list de-coding scheme in the sink, and Rossler perturbation search data matrix was used to realize the one by one code system. Gra-dient descent information was used as unstructured P2P network weights. Global optimization and intelligent search was re-alized. Chaotic sequence encryption key was used to realize the sink decoding. Information bandwidth occupancy rate was reduced. Coding vector distribution restriction was reduced. Simulation results show that, the coding algorithm has low bit error rate, it does not need additional secure channel with high communication efficiency. And it can effectively resist the attack of strength pollution, and it is much suitable for unstructured P2P network secure communication.