High Safety Scheme of Key Pre-distribution with a Mobile Sink in Wireless Sensor Network
Ya Chen · Journal of Guangxi Normal University · 2013
In the wireless sensor network with a mobile sink,the mobile sink and the sensors use their shared keys to communicate with each other securely.When some nodes are captured by the adversary,the key information maybe exposed.If each node stores large number of keys,it would reduce the network resilience.Otherwise,it may reduce the network connectivity.In order to solve this problem,this paper proposes a new key pre-distribution scheme,named N-PGPS,which is based on the algorithm of PGPS.This scheme adopts a symmetric polynomialU(x′,y′) to produce a perturbed key,which enhances the network resilience effectively.In addition,changing the value oftandsin N-PGPS can also increases the network connectivity observably.The analytical results clearly show that the new schemes perform better in the aspect of network resilience and network connectivity than the existing key predistribution schemes in a wireless sensor network with a mobile sink.