基于Logistic混沌系统的网络视频加密算法研究

提出了一种基于Logistic混沌映射的实时视频保密通信方案，在SEED-VPM642平台上实现了网络视频加密传输的全双工系统．重点研究了混沌系统的变参数、定点运算及动态加密算法的原理，在原有传统的异或加密算法上加以改进．采用Logistic离散混沌序列对实时视频传输系统进行加／解密设计，达到视频数据在网络上的安全传输，并从算法的安全性、效率等方面进行了性能分析．实验结果表明，与Lorenz混沌系统相比，该算法具有良好的实时性和快速性．可有效保障网络视频传输的流畅性及安全性．

STUDY ON NETWORK VIDEO ENCRYPTION ALGORITHM BASED ON LOGISTIC CHAOTIC SEQUENCE

A real-time video secure communication scheme based on Logistic chaotic sequence is presented in this paper, which has been accomplished on the platform of SEED-VPM642. This scheme focuses on the principle of parameter-changeable, fixed-point operation and chaotic dynamic encryption algorithm, and improves the traditional encryption algorithm. In order to realize information security and confidentiality, a Logistic discrete chaotic system is embedded into video transmission system for video encryption, the security and performance of the proposed algorithm is also estimated. The result shows that： compared with Lorenz system, this algorithm possesses favorable characters of real-time and speediness, which can guarantee fluency and security of network video communication system.