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XML Security in XML Data Integrity, Authentication, and Confidentiality

By Baolong Liu

Abstract

The widely application of XML has increasingly required high security. XML security confronts some challenges that are strong relating to its features. XML data integrity needs to protect element location information and contextreferential meaning as well as data content integrity under fine-grained security\ud situations. XML data authentication must satisfy a signing process under a dependent and independent multi-signature generation scenario. When several different sections are encrypted within the XML data, it cannot query the\ud encrypted contents without decrypting the encrypted portions. The technologies relating to XML security demand further development.\ud \ud \ud This thesis aims to improve XML security relative technologies, and make them more practicable and secure. A novel revocation information validation approach for X.509 certificate is proposed based on the XML digital signature technology. This approach reduces the complexity of XKMS or PKI systems because it eliminates the requirement for additional revocation checking from XKMS or CA. The communication burden between server and client could be alleviated.\ud \ud \ud The thesis presents the context-referential integrity for XML data. An integrity solution for XML data is also proposed based on the concatenated hash function. The integrity model proposed not only ensures XML data content integrity, but also protects the structure integrity and elements’ context relationship within an XML data. If this model is integrated into XML signature technology, the signature\ud cannot be copied to another document still keeping valid.\ud \ud \ud A new series-parallel XML multi-signature scheme is proposed. The presented scheme is a mixed order specified XML multi-signature scheme according to a dependent and independent signing process. Using presented XML data integrity-checking pool to provide integrity-checking for decomposed XML data, it makes signing XPath expression practicable, rather than signing XML data itself.\ud \ud \ud A new labeling scheme for encrypted XML data is presented to improve the efficiency of index information maintenance which is applied to support encrypted XML data query processing. The proposed labelling scheme makes maintenance\ud index information more efficient, and it is easy to update XML data with decreasing the number of affected nodes to the lowest. In order to protect\ud structural information for encrypted XML data, the encrypted nodes are removed from original XML data, and structural information is hidden.\ud \ud \ud A case study is carried out to demonstrate how the proposed XML security relative approaches and schemes can be applied to satisfy fine-grained XML\ud security in calibration certificate management

Topics: T1
OAI identifier: oai:eprints.hud.ac.uk:9671

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