| 一种保密性可分级的视频加密方案 |
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| 引用本文： | 李伟,徐正全,姚晔.一种保密性可分级的视频加密方案[J].计算机工程与应用,2006,42(5):107-109,112. |
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| 作者姓名： | 李伟 徐正全 姚晔 |
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| 作者单位： | 武汉大学测绘遥感信息工程国家重点实验室多媒体通信工程中心,武汉,430079 |
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| 基金项目： | 湖北省科技攻关项目;湖北省武汉市科技攻关项目 |
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| 摘 要： | 在不同的应用场合对视频信息有不同级别的安全性需求。分析了现有的两种可分级视频加密方案,进而基于视频的信源特征,提出了一种不改变码流格式的保密性可分级的视频加密方案。方案定义了视频码流中的几种关键信息作为加密的对象,然后通过选择加密信息类型的不同组合来实现不同的保密级别。试验结果表明该加密方案不改变视频码流格式、不影响视频的实时传输、不增加额外带宽,根据选用不同的密级可以适用不同安全性需求的应用场合。
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| 关 键 词： | 视频加密 多媒体信息安全 保密性可分级 码流兼容 |
| 文章编号： | 1002-8331-（2006）05-0107-03 |
| 收稿时间： | 2005-09 |
| 修稿时间： | 2005-09 |
A Video Encryption Scheme with Multiple Security Levels |
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| Li Wei,Xu Zhengquan,Yao Ye.A Video Encryption Scheme with Multiple Security Levels[J].Computer Engineering and Applications,2006,42(5):107-109,112. |
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| Authors: | Li Wei Xu Zhengquan Yao Ye |
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| Affiliation: | Multimedia Communication Engineering Center,State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan 430079 |
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| Abstract: | There are different security requirements of video information in different application.A format-compliant video encryption algorithm with multiple levels of security is presented.The characteristics of video stream format are analyzed and then a several types of significant information in stream are defined.When the selected significant information is changed the format of video stream will not be altered.Experimental results show that this scheme is fast enough to meet the real-time requirement of video application,do not increase the stream size,and above all it can meet the different security requirements of video application through selecting the security level. |
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| Keywords: | video encryption multimedia information security multiple security levels format-compliant |
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