关键词: 传感器网络, 对偶编码, 随机密钥, 密钥安全

Abstract: In order to further enhance the probability of direct key establishment between nodes in wireless sensor networks, reduce the communication cost of indirect key establishment, and improve the safety performance, a new algorithm for establishing random key based on pairwise coding was proposed. In this new algorithm, first, the nodes were coded with random digit. Then, the first time communication was set up between any two nodes, and the last key's parameter was ensured by thrice handshake. The theoretical analysis and experimental result show that, compared to the traditional algorithm of pairwise key establishment, the new algorithm has higher probability of direct key establishment and key safety, and lower communication costs.

Key words: sensor networks, pairwise coding, random key, key safe