关键词: 传感器网络, 密钥预分配, 密钥链, 子密钥池, 对密钥建立

Abstract: In sensor networks, the number of nodes that can work well decreases with time. To keep networks working, it is nece-
ssary to timely add new nodes to networks. For sensor networks, an efficient key establishment scheme is proposed. In the scheme, n disjointed sub-key pools are constructed, and there are association keys between two adjacent sub-key pools. Nodes deployed in the jth time are preloaded with keys only chosen from the jth sub-key pool. The theoretical analysis and numerical experiment show that the proposed scheme can provide stronger resilience against node capture compared with the existing schemes that use fixed key pools.

Key words: sensor networks, key predistribution, key chains, sub-key pools, pairwise key establishment