Conference paper

Low cost security for sensor networks

We design and evaluate a lightweight encryption protocol suitable for sensor networks, that enables weak security in the presence of passive eavesdroppers. At every communication round, our protocol creates a key between each sensor node and the sink, by appropriately mixing and coding information packets that the nodes passively overhear. Evaluation using the TOSSIM simulator indicates that with our protocol we can gain significant security benefits at low overhead cost.

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