CASIA OpenIR  > 毕业生  > 硕士学位论文
Alternative TitleResearch and Implementation of Techniques of Richmedia Content Copyright Protection
Thesis Advisor张树武
Degree Grantor中国科学院研究生院
Place of Conferral中国科学院自动化研究所
Degree Discipline软件工程
Keyword数字版权管理 数字媒体 加解密 Digital Copyright Management Digital Media Encryption
Abstract数字版权保护技术(DRM)是数字内容交易和传播的关键技术,现在已出现 了针对不同的资源、使用范围、使用方式、权限控制方式的产品和系统。 本论文中实现的富媒体版权保护系统在实体上分为三部分: 1,在发布端实现富媒体资源的加密及发布功能。发布端对不同富媒体资源 采取不同的加密策略加密并将资源发布出去。 2,在客户端实现富媒体资源的解密、显示功能。用户取得资源后根据自身 需求向服务器端请求相应的使用许可证,并在许可证规定的权限控制下对资源 进行使用。 3,在版权管理服务器端实现版权控制功能。根据用户请求生成、发放许可 证,并根据许可证进行用户使用权限控制。 本论文有以下几个研究点: 1,权限管理及许可证生成。许可证对资源的权限描述如何支持各种数字内 容的消费方式、消费限制。 2,加解密策略与流程。对数据量大小不一的富媒体资源如文本和视频等采 用不同的加密策略。将解密资源的密钥封装在许可证内,许可证使用非对称加 密方式加密并且进行数字签名后颁发给用户。 3,安全的富媒体资源呈现工具。富媒体资源使用 HTML 标记语言来表示, 所以采用 Firefox 浏览器源码来实现此客户端。
Other AbstractAs the key technology of transaction and transmission of digital contents, Digital Right Management(DRM) has already had some products and systems for different resources, with range of uses, usage modes and ways of authority control. The richmedia DRM implemented in this paper in the entity is divided into three parts: 1, Implementation of encryption and transmission mechanism for richmedia resources in publish terminal. Here, we use different encryption strategy for different resources, depending on their file formats, sizes, etc. 2, Implementation of decryption and display function in client terminal. After obtaining encrypted richmedia resources, users could apply licenses, according to their demanding, to decrypt and display these contents in client terminal. 3, Implementation of copyright control function in DRM server terminal. Licenses are generated and distributed from here to client server. This thesis contains the following study site: 1, Copyright management and generation of license. The description of richmedia resources in license should support different restrictions and patterns of consumption. 2, Strategy and procedure for encryption and decryption. We use different strategies to contents with different sizes, encapsulate the key to decrypt in license, encrypt license in dissymmetrical encryption way and digital sign it before giving it to users. 3, A secure client software to display richmedia resources. These contents are expressed in HTML, so we use Mozilla Firefox browser source code to implement our client. Because user’s private key is built in the client, some more research on preventing software cracking is needed.
Other Identifier200828009029086
Document Type学位论文
Recommended Citation
GB/T 7714
朱兴灿. 富媒体版权保护技术研究与实现[D]. 中国科学院自动化研究所. 中国科学院研究生院,2011.
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