Crowds: anonymity for Web transactions
ACM Transactions on Information and System Security (TISSEC)
Directed diffusion: a scalable and robust communication paradigm for sensor networks
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
GPSR: greedy perimeter stateless routing for wireless networks
MobiCom '00 Proceedings of the 6th annual international conference on Mobile computing and networking
Untraceable electronic mail, return addresses, and digital pseudonyms
Communications of the ACM
System architecture directions for networked sensors
ASPLOS IX Proceedings of the ninth international conference on Architectural support for programming languages and operating systems
Building efficient wireless sensor networks with low-level naming
SOSP '01 Proceedings of the eighteenth ACM symposium on Operating systems principles
A two-tier data dissemination model for large-scale wireless sensor networks
Proceedings of the 8th annual international conference on Mobile computing and networking
GHT: a geographic hash table for data-centric storage
WSNA '02 Proceedings of the 1st ACM international workshop on Wireless sensor networks and applications
LEAP: efficient security mechanisms for large-scale distributed sensor networks
Proceedings of the 10th ACM conference on Computer and communications security
Proceedings of the 1st international conference on Embedded networked sensor systems
Enhancing Source-Location Privacy in Sensor Network Routing
ICDCS '05 Proceedings of the 25th IEEE International Conference on Distributed Computing Systems
TSAR: a two tier sensor storage architecture using interval skip graphs
Proceedings of the 3rd international conference on Embedded networked sensor systems
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Numerous schemes have been proposed to facilitate data collection and provision in sensor networks, among which the Data-Centric Storage (DCS) scheme is an energy-efficient solution and a popular choice for many sensor network applications. However, since each sensor node in the DCS system knows the locations of all storage nodes, the DCS system is extremely vulnerable to security attacks as a single compromised sensor node will expose all the storage locations to the adversary. To address this problem, we propose a randomized storage concealment scheme along with a supplementary storage migration scheme. In the randomized storage concealment scheme, sensor nodes cooperate to forward data towards the storage nodes without keeping explicit storage locations; instead, each sensor node only maintains the IDs of its randomly-picked next-hop nodes towards the storage nodes. This scheme increases the difficulty significantly for the adversary to derive the storage locations. Nevertheless, the protection provided by this scheme degrades gradually as more and more sensor nodes are compromised. Hence, we further introduce a storage migration scheme to supplement the randomized storage concealment scheme, which directs the storage duties to migrate periodically among sensor nodes. Extensive analysis and simulations are conducted to show that the proposed schemes can effectively protect the storage location privacy with modestly added overhead.