The Study And Implementation Of Wireless LAN Security Protocol Based On IEEE 802.11i

In this new era, Wireless LAN is one of the most promising technologies in the field of telecommunication. However, it should have more strict measures to communicate securely for its openness of wireless media. If security problems are not solved correctly, they will restrict the development of WLAN. Alas, as we can see from the current situation, security lags far behind application.IEEE task group I is standardizing wireless security protocol, namely the 802.11i, which aims at establishing Robust Security Network. It is so new that few work on it. I dissectsed 802.11i into several aspects, including security capbility discovery, authentication and access control, dynamic key management, data transfer. To fully undestand it, I systematically studied 802.11 related standards, theory of applied cryptography and other protocols about network security. At the meantimes, I put forward some viewpoints about it.The implementation was based on Linux, and I used many open sources from Internet. And I have set up a wireless LAN environment featured with 802. lx by using such open source projects as Xsupplicant, Hostap and freeRadius. However, it is too simple to satisfy the requirement of 802.11i. So, I firstly read their codes carefully and then added more functions to their original implementations. After extensizing such modules as PCMCIA driver, Kernel cryptographic algorithms and dynamic key management, I finally implemented 802.11i.In the end, the thesis also analysis and introduce the new development of WLAN and WAPI, the newly-issued standard of wireless LAN in China.