Key inheritance-based false data filtering scheme in wireless sensor networks

Key inheritance-based false data filtering scheme in wireless sensor networks

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When sensor networks are deployed in hostile environments, an adversary may compromise some sensor nodes and use them to inject false sensing reports. False reports can lead to not only false alarms but also the depletion of limited energy resource in battery powered networks. The interleaved hop-by-hop authentication scheme detects such false reports through interleaved authentication. However, a false report can be forwarded toward the base station significant number of hops before it is detected and dropped. In this paper, we propose an enhanced interleaved authentication scheme called the key inheritance-based filtering that prevents forwarding of false reports. The keys of each node used in the message authentication consist of its own key and the keys inherited from its upstream nodes. Every authenticated report contains the combination of the message authentication codes generated by using the keys of the consecutive nodes in a path from the base station to a terminal node. The proposed scheme can detect a false report at the very next node of the compromised node that injected the false report before it consumes a significant amount of energy.

Key inheritance-based false data filtering scheme in wireless sensor networks

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