| Summary: | 碩士 === 國立中興大學 === 資訊科學系所 === 95 === Ubiquitous computing environments result from the development of information network. Plenty of services which offer services by means of the locations of users appear in this environment. Therefore, location information can serve as an authentication means in ubiquitous computing environments. However, it is harder and harder to authenticate users’ locations because users are movable in this environment. According to previous technical literature, many previous studies were done by using the concept of relative distance to achieve location authentication. We offer a new applied framework using RFID, Mobile RFID, to build the whole environment and make use of the concept of absolute distance to achieve the goal of location authentication. In addition, our method ensures that users are still in the distance for servers to authenticate when waiting for authentication. Moreover, building the whole environment consumes fewer resources, and is less influenced by environment limitations and hence more practical.
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