KEY PRE-DISTRIBUTION SCHEME FOR RANDOMIZED SECURED ROUTING IN WIRELESS SENSOR NETWORKS
Ilango Paramasivam · 2013
In wireless sensor networks (WSN’s), majority of its applications necessitate the confidentiality of information they transmit. This can be achieved through secure key management schemes. In this paper, a key pre-distribution scheme for randomized secured routing is proposed for WSN. Initially, the sink utilizes the one hop neighbor information of nodes to predistribute keys. It randomly chooses (n/2) nodes and distributes with (k+m) keys and other nodes obtain (k) keys. Nodes with more shared keys are considered as high resilient nodes. During data transmission, high resilient nodes are preferred to other normal nodes and the next hop is randomly selected from the secured minimum hop neighbors. When there is more than one secure minimum hop links, then a weight function is assigned and the best path is elected. The proposed scheme is simulated in NS-2 and it is shown that it provides high resilience and delivery ratio with reduced energy consumption.