基于AES的改进视频加密测试

Improved video encryption test based on AES

摘要:

为了使得视频加密技术具有更加良好的加密效果，在原本AES加密算法基础上进行了创新，通过加密元素的选取、运动矢量的加密方案设计、DCT变化系数的加密方案设计三部分进行了展开分析与实验。经过后续仿真验证，密钥敏感性得到了很好的提升；视频质量方面，改进后的AES算法的RGB直方图可知其加密效果和解密还原效果良好，经过对比分析，改进后的AES算法加密的SSIM值最小、PSNR值更低，即加密效果相对更好；经过计算可知，编码时间百分比增加了0.23%，解码时间百分比增加了8.56%，对NPCR、UACI以及加密前后视频帧像素对的相关系数等参数分别测试可知，相比前人的几种加密方式，改进后视频加密安全性能最好。综上分析可知，改进后视频加密效果最好。

Abstract:

In order to make the video encryption technology have a better encryption effect, based on the original AES encryption algorithm, through the selection of encryption elements, motion vector encryption scheme design, DCT change coefficient encryption scheme design three parts of the analysis and experiment. After the subsequent simulation verification, the key sensitivity has been well improved; In terms of video quality, the RGB histogram of the improved AES algorithm shows that its encryption effect and decryption and restoration effect are good. Through comparative analysis, the improved AES algorithm has the smallest SSIM and lower PSNR value, that is, the encryption effect is relatively better. After calculation, it can be seen that the percentage of encoding time increases by 0.23%, and the percentage of decoding time increases by 8.56%. The parameters such as NPCR, UACI and correlation coefficient of video frame pixel pairs before and after encryption are respectively tested, and it can be seen that the improved video encryption has the best security performance compared with previous encryption methods. From the above analysis, we can see that the improved video encryption has the best effect.