| Summary: | 碩士 === 世新大學 === 資訊管理學研究所(含碩專班) === 98 === With the rapid development in network technology, more users want to access the Internet by using wireless networks. To achieve the purpose, WLAN (Wireless Local Area Network) and the Third Generation of Mobile Communications are proposed. WLAN and 3G networks provide the different advantages in transmission rate, signal coverage, cost of building and quality of service, and 3G/WLAN integrated networks combine these advantages. By the integrated infrastructure, the transmission range of wireless network is extended and the service quality is enhanced, too. 3G/WLAN networks is composed of heterogeneous networks, and security in these heterogeneous networks is more stringent. In order to prevent the malicious user in such network, some secure transmission mechanisms are needed. In this paper, we proposed a secure RFID authentication mechanism for 3G/WLAN networks. The proposed mechanism helps the messages exchanged correctly, and ensures the message sent by legitimate devices with mutual authentication. Moreover, the proposal mechanism adopts the re-authentication method to reduce the user authentication process and time.
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