摘要
该文探讨了两种对多媒体文件进行加密的方法,全文件加密和格式加密方法,并比较了两种方法的优缺点;对加密多媒体文件的播放,作者通过对DirectShow技术体系结构的分析,提出了一种实现对加密多媒体文件播放的新方法。该方法通过编写新的源滤波器,对加密多媒体文件进行解密操作,使之成为系统可辨识的多媒体格式,并利用Win-dows系统自带的MediaPlayer进行播放。这种方法大大降低了软件开发的成本、时间和难度。
This paper discusses two encrypting methods of multimedia files,all-file-encrypting and format-encrypting,and compares the two methods.Based on the analysis of the construct of DirectShow technology system,this paper puts forward a new method which realizes the playing back of encrypted multimedia content.Through building up a new source filter,we decrypt the encrypted multimedia files.Then they can be played using Media Player,which is a built-in part of Windows system.Using this method,the expense and difficulty of software development can be reduced.
出处
《计算机工程与应用》
CSCD
北大核心
2004年第10期119-121,145,共4页
Computer Engineering and Applications
基金
国家863高技术研究发展计划基金项目(编号:2001AA135090)资助
