Abstract
Protocol designs in wireless sensor networks (WSNs) have to consider many constraints such as limited power and computing capacity. We propose an end-to-end adaptive confidentiality mechanism (ACM), which significantly reduces the risk of adversary capturing aggregated messages leaving a cluster head while meeting these rigid resource constraints. ACM divides an encrypted message into several segments and sends them to a pre-defined super node set. The super nodes encrypt and forward the segments to a super node set leader which, then decrypts and reconstructs the original message. Analysis shows that ACM improves data confidentiality by several magnitudes without adding significant communication and processing overhead.
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