| Summary: | 碩士 === 國立中興大學 === 資訊科學研究所 === 87 === Mobile Satellite Communication System (MSCS) is a world-wide wireless communication network which is constructed from a dozen or hundreds of Low Earth Orbit (LEO) communication satellites. MSCS can provide high speed and high bandwidth communication services beyond the geographic environment limits. Therefore, MSCS will be a shining nova in the 21st century. Up to now, many MSCS building projects have been proposed, but without mature security considerations. In this thesis, we study the security issues in MSCS, and propose a Mobile User Authentication method based on Digital Signature Scheme（DSS）.
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