Design And Implementation Of An Access And Transition Protocol In WLAN

With the rapid growth of information and network technologies, the usage of WLAN becomes an important symbol of societies'development. WLAN gives us more convenient, but also take more security challenges to us. If the WLAN's problem can not be solved properly, it will effect the development of WLAN. As the building block of network security, cryptography protocols can be used not only to provide information confidentiality, but also to resolve most of the security problems in WLAN. So the correctness and security of these kinds of protocols are very important.This paper introduces the existing security protocols in WLAN firstly, including secure access protocol and fast transition protocol, and indicates some defect in these protocols. Secondly, a new secure protocol is introduced, with its interaction and analysis of key management. It concludes the new protocol is secure and efficient theoretically.Based on the analysis of security protocol, the procedure of a WLAN protocol's development is presented, and a new authentication system of WSAHP protocol is designed and implemented, which is composed of wpa_supplicant, hostapd, freeradius. At last, a wireless network environment is built and the program is tested. The testing result shows that the system implemented WSAHP protocol attains the design goal and can achieve the function of WSAHP protocol.