Multihop-Based Key Management in Hierarchical Wireless Sensor Network

The vulnerable environment and open communication channel make it very necessary to protect wireless sensor networks (WSNs). The key management is the most important way to protect the communication in WSNs. In this paper, we design a Multihop-based Key Management (MKM) which can efficiently enhance the security and survivability in the hierarchical WSNs. Different from previous works, we present the key system as well as the cluster formation. The MKM generates and distributes keys based on hop counts, which not only localizes the key things but also has no overhead. The MKM provides the session keys among sensors and the cluster key between the cluster head and its member nodes. The different hops make the different keys. The MKM can protect the network from the compromised nodes by reducing the high probability of the common keys. The security analysis can effectively prevent several attacks.

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