A key-management scheme for distributed sensor networks
Proceedings of the 9th ACM conference on Computer and communications security
The number of neighbors needed for connectivity of wireless networks
Wireless Networks
E.cient Aggregation of encrypted data in Wireless Sensor Networks
MOBIQUITOUS '05 Proceedings of the The Second Annual International Conference on Mobile and Ubiquitous Systems: Networking and Services
The hybrid mobile wireless sensor networks for data gathering
Proceedings of the 2006 international conference on Wireless communications and mobile computing
Secure data aggregation with multiple encryption
EWSN'07 Proceedings of the 4th European conference on Wireless sensor networks
Re-visited: denial of service resilient access control for wireless sensor networks
ESAS'06 Proceedings of the Third European conference on Security and Privacy in Ad-Hoc and Sensor Networks
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We introduce the concept of secure overlays over static key distribution schemes to enable the use of mobile base stations for secure data querying in wireless sensor networks. Secure overlays are key distributions initialized from fixed initialization points, allowing queries to be inserted anywhere in the network. We thereby overcome the need for re-keying when a base station moves, at the cost that a query only spreads in a limited part of the network along the key distribution. On the example of a layered key distribution and a query dissemination protocol we argue that the use of only a few secure overlays can compensate for that artifact. Queries sent from within the area defined by the initialization points reach a significant part of the sensor nodes within the first few hops.