| Summary: | 碩士 === 長庚大學 === 資訊管理學研究所 === 97 === With the constant improvement of internet technology, people have higher and higher expectations for internet and the mobile devices. PDA phone is often used to check e-mail and to download music and video. A great amount of packets transmitting on the internet when using these internet and mobile devices, therefore an uninterrupted high speed and a secure mechanism are necessary to satisfy the users.
The thesis proposes a study focusing on the integration of 3rd generation (3G) and Wireless Local Area Network (WLAN) authentication mechanisms, indicates 3G as Universal Mobile Telecommunications System (UMTS), and uses EAP-TTLS to protect user’s International Mobile Subscriber Identity (IMSI) in cipher text. In addition, the thesis uses Inter Access Point Protocol (IAPP) and pre-registration mechanism to improve the seamlessly handoff between old Access Point (AP) and new AP, to prevent the lost of users’ information and AP’s malicious invasion, and to decrease the whole handoff time. Lastly, the thesis also takes the mobile equipment’s computation ability into consideration to analyze the efficiency, including the computation times and execution time. The proposed method emphasizes the authentication, transmission security and fast handoff between APs to let users enjoy the convenience of 3G and WLAN.
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