超混沌视频加密系统的FPGA设计与实现

随着多媒体技术的不断发展，视频信息安全愈发受到人们的关注。为解决视频信息的安全问题，提出了一种基于现场可编程门阵列(FPGA)技术的超混沌视频加密方法。在加密过程中，一方面FPGA控制数字摄像头实现实时彩色视频信息的采集；另一方面，在计算机密钥指令下，利用FPGA使超混沌系统产生有效的伪随机序列，实现对所采集视频信息的数据和地址的双重超混沌加密。给出了具体的超混沌视频加密算法和设计流程以及FPGA实现结果。安全性分析表明，明密文主观视觉对比显著不同，密钥空间大，视频图像统计特性的相关性弱，说明基于FPGA的超混沌视频加密系统加密效果良好可靠。

FPGA design and implementation of a hyperchaotic video encryption system

With the continuous development of multimedia technology,the security of video information has been paid more and more attention.In order to solve the security problem of video information,a hyperchaotic video encryption method based on Field-Programmable Gate Array(FPGA) technology is proposed.In the encryption process,on the one hand,the FPGA controls the digital camera to implement the information collection of video in real-time;on the other hand,the FPGA produces the pseudo sequence of hyperchaotic system.The double encryptions of data and address are implemented for the video information collected from camera.The detail algorithm and design diagram of the hyperchaos-based video encryption are given and the results of FPGA implementation are provided.Analysis of security shows the subjective visual contrast of the cryptogram is significantly different,the key space is large,and the correlation of the statistical characteristics of the video image is weak,which proves that the encryption effect of hyperchaotic video encryption system based on FPGA is good and reliable.