Secure data retrieval system (SEDAR) for DTNs

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. We have recently evaluated the performance of two information retrieval schemes that are designed to work in the DTN environments. Our 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, we present a data-centric security solution for an information retrieval system which we design for DTN environments. We also describe the preliminary prototype that we have built.