Research On Access Authentication Technology For The Soft Define Wireless Networks

With the rapid development of mobile intelligent terminal equipment,the wireless network access has become the most extensive standard for the Internet access.The deployment of WLAN is also everywhere.However,the security aspect of wireless network recently attracts high attention as the applications of mobile payments and digital wallet became more and more popular.The access authentication technology as the first line of defense for the network security,and has an important position in the network security.However,there are two problems in the access authentication technology of existing WLAN.On the one hand,the delay of WLAN authentication is longer in the process of roaming,which leads to the poor user experience.On the other hand,the wireless frame is not authenticated in WLAN,which leads to legitimate terminal may have the possibility of being faked.The SDN,a new research focus of the current network architecture,with the characteristics of centralized control,network programmability and resource virtualization,which can be introduced into the WLAN(SDWN)to solve these problems.In order to solve the above problems,firstly,this thesis proposes a fast authentication mechanism which uses AP virtualization technology to achieve rapid authentication for roaming in SDWN to achieve reliable control of the terminal access authentication process.Since the legitimate terminals may be faked,this thesis proposes a scheme of SN-based MAC address spoof detection in the SDWN,which guarantees the rights and interests of the legitimate user terminal.Finally,this thesis designed and implemented the access authentication prototype system to verify the correctness and practicability of the above method in the SDWN.Based on SDWN experimental bed,the test results show that the access authentication technology can provide a unified authentication function for the mobile terminal,shorten the authentication delay of the roaming which ensure network access authentication services,and achieve high cheating detection success rate for the legitimate terminal to provide the network security.The research of access authentication technology provides technical support for the construction of SWDN experimental bed,researching and developing the key technology of the access authentication technology in the software defined wireless network.