Research on the Resilience of Key Management in Sensor Networks

Resilience against node capture is one of the main indicators of the key pre-distribution security in sensor networks. On providing the attack model and the defi- nition of the resilience against node capture of sensor networks, the resilience of basic random key pre- distribution, Q-composite random key pre-distribution and their reinforced schemes are analyzed and com- pared in depth. Research results show that the size of key pool, the numbers of the keys stored in nodes and the value of Q determine the resilience of random key pre-distribution. The tradeoff between the resilience, security connectivity and costs in sensor networks is presented. These researches lay a foundation on the design of the secure protocol and the algorithm in the specific application environment of sensor networks.