期刊名称：International Journal of Computer Technology and Applications
电子版ISSN：2229-6093
出版年度：2013
卷号：4
期号：6
页码：869-879
出版社：Technopark Publications
摘要：In this work, an attempt is made to analyze four fast MPEG video encryption algorithms. These algorithms use a secret key randomly changing the sign bits of DCT coefficients and/or the sign bits of motion vectors. The encryption effects are achieved by the IDCT during MPEG video decompression processing. These algorithms add very small overhead to MPEG codec. Software implementations are fast enough to meet the real time requirement of MPEG video applications and thus the analysis shows that satisfactory results can be obtained using these video encryption algorithms. The experiments conducted helped us analyze two points. First, to test the encryption results with overheads added to MPEG codec and second, encoding time with varying key lengths. We believe that these experiments will produce satisfactory results and thus help to know the efficiency and application of such algorithms in the real world. And will also give us a chance to analyze the drawbacks in the existing algorithms so that certain modification may be suggested for getting fast and better security.
关键词：MPEG video encryption; MPEG codec; VEA algorithms
