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Data outsourcing is today an emerging paradigm with many benefits in terms of reduction of costs, scalability and better service. For the widespread adoption of this paradigm, it is important that both the data owners and users have strong security guarantees with respect to data management. This paper presents a comprehensive framework for the secure outsourcing of XML data, by mainly focusing on confidentiality and completeness requirements. In the paper, besides presenting the techniques and related data structures underlying the framework, this paper illustrates the prototype system the authors have developed and discuss storage and communication overheads implied by the solution.
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