Research And Application Of XML Security In Electronic Official Documents

E-government is popular these years. More and more government departments deal with daily affair through networks. Accordingly, the way to cope with office documents by hand changes to electronic office documents. There are many benefits for work through network, such as high transparency, low cost, high efficiency and more convenience. But if the security can not be guarded, no merit comes and e-government will collapse.The security of e-office document is more important compared to the traditional work style that use paper to transmit information. How to realize multi-signature and encryption for e-office document is problem deserved research. For encryption, symmetrical encryption arithmetic and unsymmetrical encryption arithmetic are available. Contrast to unsymmetrical encryption arithmetic, the speed of symmetrical encryption arithmetic is higher. But if it used to encrypt mass data, we still can't bear the speed. Luckily, no all of the data needs encrypted. Instead, part of the whole e-office document needs encrypted. If just encrypt part of the e-office document, the speed will be advanced, and the unencrypted data is convenient for search and sort. Therefore partial encryption for e-office document requires us to solve, because the traditional way to encrypt is for the whole document.In reality, the same document may be created by more than one person or department. For the paper document, to seal the document with different seals is ok. But for e-office document, how we realize the scene that many people sign the same document? That is the second problem considered in this paper. Different department may use different tools to edit the e-office document on different platform, so we should take into account that how to show the document result from different platform with the same display usage? That is the third problem considered in this paper.The paper analyses the problem existing in e-office document commuting, present the idea using XML express e-office document. Then study the Wordinner structure and research the XML encryption criterion and XML signature criterion. After that, creatively advance a model for transferring the e-office document in security based on XML, probe into the principle and technique about XML signature and encryption and the conversion method between XML and Word document, and give the steps about implementing the model. The model can solve the problems as follows: firstly, how to transfer e-office document in security, that is to say, guarantee the authentication, integrality, un-denied and privacy;secondly, how to transfer e-office document between different system platform;thirdly, how to realize only the receiver own the special privilege can see the content;fourthly, how to realize multi-signature on the same e-office document.