Points Security Classification Digital Watermark In E-government Document

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.