Improved scheme based on random key predistribution for wireless sensor network
无线传感器网络随机密钥预分配改进方案

Due to the limitation of the nodes energy and the limitation of memory resources and computation ability in the Wireless Sensor Network (WSN), the traditional network security is challenged. Fully considering the characteristics of WSN, a key distribution scheme was proposed based on pre-shared key and random key distribution scheme, in which only ID-number of key in key pool was saved so as to save memory resources of sensor nodes. Furthermore, in view of the characteristics of resource limitation of sensor nodes, the working load of nodes was reduced through decreasing conversation steps and simplifying computation approach under the premise of satisfying the encryption needed. Thus in the scheme, the memory resource of the nodes and the correspondence cost are extremely small, and the working efficiency of the sensor network is improved greatly.