基于相位-幅度转换和数字混沌密钥的光混沌保密通信理论与实现技术研究

项目名称： 基于相位-幅度转换和数字混沌密钥的光混沌保密通信理论与实现技术研究

项目编号： No.61505061

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 半导体科学、光学和光电子学

项目作者： 程孟凡

作者单位： 华中科技大学

项目金额： 20万元

中文摘要： 光纤窃听技术的发展使得光纤通信的安全性面临前所未有的威胁。混沌保密技术作为新型加密技术之一在国内外得到了广泛和深入的研究，但光混沌保密通信普遍存在如下关键问题：器件参数安全性和混沌同步鲁棒性之间的矛盾、光混沌系统的安全性与混沌同步实现复杂性之间的矛盾、系统加解密速度和安全性之间的矛盾。围绕这些挑战，本项目提出一种基于相位-幅度转换和数字混沌密钥的新型保密通信体制；设计并实现无统计特征、大密钥空间的高速率混沌保密光通信系统。本项目的特色与创新在于：1）基于光学混沌信号的相位-幅度转换机理，实现无需混沌同步的混沌掩盖机制；2）基于多延迟互耦合的思路，设计无统计特征的宽带相位光学混沌源；3）结合数字混沌系统，基于所提出的相位-幅度转换混沌掩盖机制，设计大密钥空间、密钥敏感度可控且能够隐藏数字密钥流的抗攻击保密通信体制。本项目的研究对于混沌保密技术的发展具有重要的科学意义和实际应用价值。

中文关键词： 混沌保密通信；光混沌系统；物理层安全

英文摘要： The safety of optical communication system is threatened by the development of fiber eavesdropping technology. Chaotic secure communication technology are gaining increasing concerns in recent years. However, there are certain key issues in optical chaos communications: 1) the confliction between the safety of the device parameters and the robustness of chaotic synchronization, 2) the confliction between the system safety and the implementation complexity, 3) the confliction between the system safety and the encryption/decryption speed. In this project, a novel chaos secure communication scheme based on phase-intensity transform and digital chaotic keys will be proposed, a secure communication system with large key space and high transmission rate will be designed and implemented. This project bears its own originalities as following: 1) a novel chaos mask scheme based on phase-intensity transformation is proposed and chaos synchronization is no longer needed, 2) a novel wideband phase chaos source without statistical signature is presented based on the principle of multi-delay and mutual coupling, 3) combing with digital chaos technology, a secure communication system model with large key space, controllable key sensitiveness, and the ability to hide the digital key stream, is presented. Therefore, research results of this project will have great theoretical significance and practical values for the development of chaos secure communications.

英文关键词： chaos secure communication;optical chaos system;physical layer security