基于符号动力系统的光纤接入加密机制及关键技术研究

随着通信速率和信息量呈爆发式增长，如何保障大量数据传输安全性，特别是对广播式宽带接入网尤为重要。因此，解决信息传输安全性将是未来宽带接入网发展目标之一。本项目提出采用符号动力系统增强光纤接入网信息传输安全性的新方法与评估模型。本项目将重点从以下几方面开展创新性的工作：（1）基于符号动力系统混沌同步方法，研究其理论及混沌同步速率影响因子；（2）符号动力系统混沌随机数产生机理，探讨其有效精度和混沌数的随机性评估；（3）基于混沌同步和混沌随机数的光纤接入网架构及实验研究，完善理论模型，实验研究混沌同步质量、不同复用的宽带接入方案的密钥分配及信息变换扰码方法；（4）针对符号动力系统光纤接入网，研究随机数速率与特性及加扰方式对网络影响，运用概率统计及信息论建立符号动力系统光纤接入网物理层安全性的评估模型。研究目标是取得自主创新成果，达到或超过国际先进水平，促进我国宽带接入网部分理论与技术的发展。

With the explosive development of communication rate and amount of information, how to ensure data transmission security, especially broadcasting broadband access network, which is particularly important for the next-generation communication networks. Therefore, to solve the security of information transmission is one of the objectives in the future development of braodband access network. This project does propose, by using the symbolic dynamical system (SDS)，a new enhancement method of optical fiber access network transmission of information security and its network evaluation model architecture. This project will focus on from the following several aspects to carry out innovative works: (1) the chaotic synchronization method based on symbolic dynamical system, influencing factors on its theory and chaotic synchronization rate; (2) the generation mechanism of symbolic dynamical system-based chaotic random number, the random of effective precision and the chaotic number evaluation; (3) the chaotic synchronization and chaotic random number of optical fiber access network architecture and its experimental study based on the theoretical model, perfect, quality, the chaos synchronization of different multiplexing broadband access scheme of key distribution and information transform scrambling method; (4) the symbolic dynamical system of optical fiber access network, influence of random number rate and characteristics and scrambling on the network, by using probability statistics and information on the establishment of symbol dynamical system of optical fiber access network physical layer security evaluation model. The goal of the research is to obtain the results of independent innovation, reached or exceeded the international advanced level, promote the development of China's next generation broadband access technology of communication and networks.