Research Of 3G And WLAN Security And The Interlinkage Security

Wireless Local Area Network, is a very flexible data communication system, extends and makes up the LAN. The WLAN is booming these years. But because of the wireless transmition way and the faultiness of IEEE 802.11 protocol, security problem has become the biggest obstacle for the developing of the WLAN. 3G network is another very important network. It is one of the biggest communication networks going to be applied. But as 3G is not widely used now, security problems have not been emphasized on. This paper talk about the security problems in these two networks, did some research on 3G-WLAN link network based on EAP protocol and other security techonologies.This paper firstly introduces the background and details about research, then give the structure of our paper.The chapter two and three introduce the advantage, constructure,application and protocol of WLAN. Then talk about the security problems in WLAN, WLAN's security technologies (SSID, MAC address filter, WEP, Wi-Fi, RSN etc) in 802.11 protocol and other security protocol like WAPI and VPN. In chapter 4, we described the 802.1x protocol, descride the verification structure, port control, protocol verification and security analysis. We also introduce the most important protocol-EAP protocol in 802.1x, list some usual EAP protocol, and compare them.Chapter Five is the most important chapter in this paper, it introduced 3G network, the security analysis and infrasture of 3G, analyze the 3G Security system, like 3G security algorithm, verification, private key distribution, AKA verification. Then this paper describes the 3G-WLAN security problems in interlinkage, and gives the 3G-WLAN link security solution.In the last chaper, we give summary and prospect, first we sum all the work we did in this paper and give the limitation of our research, then give a expectation to the future 3G-WLAN link security research.