| Summary: | 碩士 === 國立中央大學 === 資訊工程學系在職專班 === 102 === User authentication over the Internet has been a long issue to the service providers as well as the users of the Internet services. A good authentication protocol must provide high security and mutual authentication for both sides. In addition, it has to find the balance between security and usability, as finding the balance is a hard problem shown in the literature. To solve this problem, we propose a novel mutual authentication protocol with high security and high usability. The proposed protocol is developed on QR code, a type of two-dimensional barcode that can be taken by the camera and be quickly decoded by smart phones. We have implemented a prototype using the proposed mutual authentication protocol, and showed how the prototype improves usability in a mobile communication system. We also use the GNY logic with several well-known attack models to analyze the security of the proposed protocol, and it shows a satisfactory result. We expect that, via the proposed protocol, the Internet service providers are able to provide a mutual authentication mechanism with high security and high usability.
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