Study On Polynomial Key Management Of Wireless Sensor Networks Based On District-Divided

The safety of the network communication has been paid atttention gradually in the wireless sensor network field.As a result of large-scale sensor network,node resourse limited,characters of the distribution and the like,the traditionnal key management and the believeable key-distributed center are hard to use through tests,while key management is one of the securities of the wireless sensor network mechanism,which is suitable.This article puts forward the polynomial-based division of the key management scheme,which bases on the summary and analysis of the living key managements, (abbreviated PKMD).Through simulation experiments,this management has improved a lot in terms of the security performance,the key-discovered possibility,the key's occupation in the node and the engergy-consumption in the course of changing the key than nowdays,and it is very feasible.The main innovations of this study are as follows1,Safety improved:Firstly,using the difficulty to crack the key,this method uses the binary polynomial-t under certain conditions to increase difficulty to crack the key. Then,adding an updated key system ensures the fresh in the progress of communication, thereby the safty performance is improved by these two ways.2,The possibility of the same key among the close nodes improved:The key's binary polynimial-t adds certain regional information into the principles of producing key management in the course of producing the key.It just remains the key which has the regional characters in the progress of forming the key rings of nodes.By this way it guarantees the possiblity of the same key among the close nodes.3,The updated key's energy reduced:The updated key just needs adding and cutting characters,instead of integrating the data.This way reduces the energy.4,The key's occupition in the nodes reduced.Forming the key rings of nodes just picks up the keys which have the regional characters and abondons a large number of useless keys,thereby it reduces key's occupation in the nodes.