现代铁路信号系统已成为高速铁路的"中枢神经系统"，控制和指挥列车运行。随着信号系统的信息化、智能化和网络化水平逐步提高，铁路专网、GSM-R无线通信网和Internet办公网逐步融合协同工作，这些因素对信号系统安全带来很大的隐患和挑战，直接威胁到列车的运行安全。但由于信号系统的实时性要求，传统密码技术难以提供有效的安全防护。本项目将面向铁路信号系统的特殊业务需求，对轻量级混沌密码的关键理论和技术展开研究，主要包括：1) 安全混沌模型的设计与优选；2) 多态轻量混沌密码算法，主要包括流密码、分组密码、hash函数；3) 混沌密码的可证明安全；4）基于混沌密码的现代铁路信号系统安全防护平台。项目成果将形成高水平学术论文15 篇左右，专利3-6件，不仅为铁路信号系统的信息安全提供保障，对混沌密码设计与分析理论、物联网/云计算/无线传感网等领域的轻量级密码技术也有较大的促进和借鉴作用

The railway signal systems have been acting as the central nervous system of high-speed railway to control the trains' running. The developments of signal systems with informatization and networking, however, seriously threaten their security. The traditional cryptography cannot protect these systems from the security risk because of the high real-time requirement of signal systems. To overcome these security issues, this project will study the lightweight chaotic cryptography, including the following aspects: the theoretical design of secure chaotic model and its reference implementations; the lightweight ciphers such as hash function, stream cipher and block cipher; the provable security of chaotic ciphers; the implementation and evaluation of chaotic ciphers. The research results will be about 15 academic papers, 3-6 patent applications, which will provide the security ensurance for railway signal systems, and also help the lightweight cryptographic techniques in IOT, cloudy computing and WSN.