无线传感器网络中一种改进型身份认证技术

s wireless sensor networks are being used in more and more fields, the network security problem has become increasingly prominent, but because of the restriction of characteristics of wireless sensor network, traditional network security technologies can not be directly applied to wireless sensor networks. Authentication technology is an important networksecurity technology to prevent illegal nodes invade network to steal information or damage the network. To solve the problem that wireless sensor network is fromed by itself and the node's resource is limited in the network, the new authentication technology based on an AES algorithm merges symmetric authentication method and password-based authentication technology, so that it not only effectively prevents illegal intrusion but also has low power consumption. at last the new authentication is achieved by CC2530 chipmodules, experimental results show that the new authentication can effectively prevent the illegal intrusion，And it not only has low power consumption but also solve the problem that traditional symmetric authentication technology has higher master-key confidentiality requirements. In addition it also can prevent the replay attack.