A Secure Scheme for Heterogeneous Wireless Sensor Networks
نویسنده
چکیده
A secure scheme for heterogeneous wireless sensor networks is presented. The wireless sensor networks have some sensor nodes and heterogeneous sensor nodes that have greater power and transmission capability than other nodes have. All kinds of sensor nodes are evenly distributed respectively in entire sensing area that is divided into a number of same cells and logical groups evenly. The pairwise keys between nodes including all kinds of nodes are set up through employing the concept of the overlap key sharing, the grid-based key predistribution scheme, and the random key predistribution scheme. The twodimensional sensing square is divided into a number of small squares called cells, four of which are comprised of a cluster called logical group for class 1 nodes. Analysis shows that both the security and the connectivity of wireless sensor networks have been enhanced evidently with some heterogeneous nodes.
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