分密级数字水印在电子政务文档中的应用

【作者】 贾玉叶；

【导师】 郝林；

【作者基本信息】 云南大学 ， 计算机技术， 2011， 硕士

【摘要】 随着计算机技术和网络通信技术的发展,我们在电子政务中面临的主要问题之一是资料管理的安全。资料的使用和传输等方面的安全是本文研究的主要问题。传统的密码学和一般的访问控制系统只能保证相关部分的安全,比如用户登录、权限控制等,针对的是电子政务系统中的部分管理。因此,研究设计一种综合的方案实现资料分密级的保护,有重要的理论意义和实用价值。数字水印技术用来保护多媒体信息安全,它结合传统的数据加密技术,实现信息的隐藏、访问控制等。分密级数字水印是在数字水印的基础上,根据水印特性,将各类数字水印技术应用到不同密级文件,从而保证密级文件的安全。本文在研究过程中,主要针对分密级数字水印展开讨论。并将其应用到电子政务的资料管理中,来验证它的实用性。基于电子政务中资料的特殊性,论文设计了一个综合安全保护方案一分密级数字水印保护方案。该方案在登录模块实现了水印与指纹结合的保护,然后根据不同密级文件的安全要求,研究应用智能技术和数据库水印技术等,对资料数据进行分析、处理。根据不同的密级和不同的实用价值,选择相应的水印来实现数据发布、存储、传输,以及事后追踪的安全保护。最后给出了分密级数字水印的应用和发展前景。更多还原

【Abstract】 With the development of the computer technology and the network communication technology, one of the important issues we are faced with is the safety of document management in the Electronic government system. The security of the document and document transmission is the major focus in the present work. Traditional cryptography and the common access control system only guarantee the safety of the relevant section. For example, the users’ login, authority control and document stored etc, which are dealing with the partial document management of Electronic government system. Therefore, research in a comprehensive plan for achieving the protection of classification has the important significance, both theoretically and practicability.The technologies of digital watermark protect the security of multimedia technology information, which combines traditional data encryption, the information for the hidden and the access control and so on. Classification digital watermark which is on the basis of the digital watermark, according to the feature of watermark, apply the different digital watermark technologies application to the classification documents, therefore protect the safety of the classification documents. In the research course of the thesis, the discussions are mainly aimed at the operation of the classification digital watermark. And it has been applied to the document management of Electronic Government, to verify its practical value.Based on the particularity of the electronic document, this thesis designs a comprehensive security plan-a protection scheme of classification digital watermark. The plan, in the login module, uses the protection form the combination of watermarks and fingerprints, and then according to the security requirements of the classification files, the intelligence technology and the database watermarking technology etc are also studied and applied, which to analyze and dispose the document data. According to the different classification and the different practical value, selects the corresponding watermark that to complete the security protection of data’s issue, storage, transport, and the subsequent trace. At last we give the application of digital watermark and the prospects of its development.更多还原