| Summary: | 碩士 === 朝陽科技大學 === 資訊管理系碩士班 === 91 === Electronic commerce had made repaid progress in recent years. Internet has to break the constraint of accordance with the time and the place, and promotes it to develop. In a traditional auction, all bidders must aggregate to cast his”her bid at the same time and same place if he”she wants to participate it. However, it is not convenient for the bidder and cannot attract more people to participate in it. Electronic auctions are difference from traditional auctions that the bidder does not present at the site of the auction. The bidder can submit a bid in anywhere through network. However, it exists some secure problems such as altering, forgery and duplicating. Various theoretical studies on Internet auctions have already been conducted. In this study, we first review and discuss that have been proposed electronic auction schemes. And then point out some flaws in the schemes. Besides, we propose three electronic auction schemes in this study which are two sealedbid auction schemes and one Electronic scheme based on our proposed group signature scheme. We hope to push forward the electronic commerce in full swing.
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