基于随机置乱算法的HDMI视频信息加密系统设计  

Design of HDMI Video Encryption System Based on Random Scrambling Algorithm

作　　者：尚涛 吴晓林[1] 商枝江[1] SHANG Tao ;WU Xiaolin ;SHANG Zhijiang(The 28th Research Institute of China Electronics Technology Group Corporation, Nanjing 210007, China)

机构地区：[1]中国电子科技集团公司第二十八研究所,南京210007

出　　处：《指挥信息系统与技术》2018年第1期96-100,共5页Command Information System and Technology

摘　　要：针对传统计算机视频系统电磁信息防泄漏方法成本高、移动不便和电磁干扰严重等缺陷,提出了一种基于随机置乱算法的高清晰度多媒体接口(HDMI)视频信息加密方法。首先,介绍了HDMI视频信息截获机理;接着,阐述了随机置乱的概念、过程与算法,提出用随机置乱改变HDMI视频信号频谱特征,降低其信噪比,使得从截获信号无法还原出有用信息;然后,在以FPGA为处理核心的硬件平台上进行了系统实现;最后,测试结果表明,该方法能减少视频信息的高频成分,降低了视频信息被截获的风险。The traditional electromagnetic information leakage prevention method for the computer video system has shortcomings of high cost,inconvenient remove and serious electromagnetic interference.Aimed at the above shortcomings,an encryption method for the high definition multimedia interface(HDMI)video based on the random scrambling algorithm is proposed.Firstly,the interception mechanism of HDMI video is presented.Secondly,the concept,the procedure and the arithmetic of random scrambling are expounded.The random scrambling algorithm is presented to change the spectrum characteristics of the HDMI video signals and reduce their signal-noise ratio.Thus,the useful information cannot be restored from the intercepted linkage signals.Then,the method is realized on the hardware platform with the FPGA process kernel.Finally,the testing result shows that the method can decrease the high frequency component of the video,thus reducing the interception risk of the video.

关 键 词：高清晰度多媒体接口 随机置乱 视频信息加密 电磁兼容 

分 类 号：TM15[电气工程—电工理论与新技术]