Enhancing the Key Pre-Distribution on Wireless Sensor Networks by Reducing Storage Overhead

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Manoj R
Tripti C,Y.Md.Riyazuddin, G.Victor Daniel


Wireless Sensor Networks (WSNs) are characterized by resource constraints and large scalability. Many applications of WSNs require secure communication, a crucial component especially in hostile environments. However, the low computational capability and small storage budget within sensors render many popular public-key-based cryptographic systems impractical. Symmetric key cryptography, on the other hand, is attractive due to its efficiency. Nevertheless, establishing a shared key for communicating parties is a challenging problem.. Key management is challenging since sensors can land anywhere after deployment. Earlier approaches on key management mostly focus on key pre- distribution where a small number of keys are placed in sensors before deployment. Several symmetric-key pre-distribution protocols have been investigated recently to establish secure links between sensor nodes, but most of them are not scalable due to their linearly increased communication and key storage overheads. To address these limitations, in this paper, different key distribution mechanisms for wireless sensor networks with fixed key storage overhead, full network connectivity, and low communication overhead are proposed.

Keywords-Pre-distribution, Deployment, Symmetric key, Storage Overhead


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