Table 1 Notations and their definitions.
From: Secure Clustering and Symmetric Key Establishment in Heterogeneous Wireless Sensor Networks
Notation | Definition |
|---|---|
| Number of sensor nodes in the network |
| Area that sensor nodes are deployed |
| Number of gateways in the network |
| Number of neighbor nodes |
| Transmission range of each sensor node |
| Largest radius of a cluster covered by each gateway |
| Sensor node |
| Area covered by each sensor node |
| Gateway |
| Symmetric key between sensor node |
| Public and private key of sensor node |
| Probability of node |
| Public and private key of gateway |
| The encryption function using the key |
| The decryption function using the key |
| Number of links connected to the node |
, 
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and 
, 
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to be compromised
, 
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