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Disruption Tolerant Networking (DTN) technology is designed to deal with the intermittent connectivity among mobile nodes due to mobility, short range radios or terrain obstacles. The authors have recently evaluated the performance of two information retrieval schemes that are designed to work in the DTN environments. Their schemes utilize both query and data replications to enhance the query success rate. Besides designing efficient query and data dissemination schemes, one needs to consider the security aspects since sensitive data should only be accessed by authorized personnel. In this paper, they present a data-centric security solution for an information retrieval system which they design for DTN environments.
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