Abstract:

Wireless sensor networks (WSN) emerged in recent years targeting on information acquisition and processing. For the reason that it is simple and low cost, the technology is widely used in all aspects. Routing algorithm is an important method of information transmission path. An efficient, safe routing algorithm plays a vital role in energy constrained wireless sensor network. In this paper, the writer paid attention to a typical routing algorithm LEACH (low energy adaptive clustering hierarchy), and on the basis of the agreement, an efficient improved LEACH was proposed to solve the problem of energy and security. Firstly, the method improved the election algorithm to optimize the mode data transmission with a base station; secondly, the paper introduced a dynamic key management mechanism in the data transmission process using the chain key calculated by Hash function to improve the safety and reduce the excessive number of interactions because key negotiation communication between nodes; finally, we simulated the algorithm proposed in this paper and got the advantages in terms of efficiency and safety through comparing with LEACH algorithm.

Key words: wireless sensor networks, LEACH algorithm, the balance of power consumption, security, dynamic key management