In order to overcome the shortcomings of connectivity and resilience, which are poor in most other key pre-distribution mechanism for Wireless Sensor Network(WSN), this paper proposes a mechanism for cluster-based networks. The mechanism makes use of the distributed management strategy and can isolate the compromised sensors from the networks instantaneously through updating the coefficients of the shared-polynomial and preventing all other sensors from establishing pairwise keys with compromised sensors as a result. Experimental results show that this mechanism has good ability to resist capture and scalability. Furthermore, the updating of the key pair in time guarantees the continuing high connectivity of the networks. Besides, the communication overhead of the base station can not increase enormously when execute revocation mechanism operating.%无线传感器网络预分配密钥管理机制的连通性和抗捕获性较差.为此,提出一种基于簇的预分配密钥管理机制.采用分布式管理策略,通过更新原始共享对称多项式的系数,确保被捕获节点无法与安全节点建立共享密钥对,从而隔离被捕获节点.实验结果表明,该机制具有较好的抗捕获性和可扩展性,密钥对实时更新能保证网络具有较高的连通性,在隔离被捕获节点时,基站的通信开销、计算开销和存储开销变化较小.
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