網路型投標系統的設計與實作

Abstract

本篇論文提出以多項式秘密分享演算法來設計一個能夠保護投標內容安全的網路型雞蛋投標系統。近來，我們想要利用電子商務技術來有效地改善傳統雞蛋交易機制，降低交易成本。但由於在網際網路上是一個開放的空間，所以如何設計一個保護標單內容安全性的機制是十分重要的，尤其當開標單位本身匿名介入交易時，更是嚴重地影響了交易的公平性。本研究可分為兩個主要的階段，在設計階段中，主要為評估數種不同的秘密分享演算法，以找出能避免上述問題的最佳方法。經過計算複雜度、使用者使用方便等考量指標評估後，選定多項式秘密分享演算法。而在實作的階段，則是以Java整合開發環境Jbuilder來設計雞蛋網路投標雛型系統，此系統並經過多次不同地點的網路測試成功，顯示了本研究想法的可行性。

A polynomial secret-sharing algorithm is proposed as a secure bid-submitting technique for trading eggs on Internet. Recently electronic commerce is treated as a promising efficient tool for reducing the transaction cost of eggs. However, this idea is only feasible before a secure bid-submitting process is guaranteed. This trouble emerges in a serious way while the bid-receiving unit submits anonymous tenders in the bidding process. So there are two major phases in this research. At the design phase, several secrete-sharing algorithms are evaluated for finding the best mechanism in order to avoid this problem. As a result, the polynomial one has been selected under the criteria such as computational complexity, user-friendly interface, etc. At the implementation phase, a secret-sharing prototype system for trading eggs on Internet has been implemented using a Java software named JBuilder. Also the underlying system has been well tested through various Internet channels at different sites. Both tasks show the feasibility of the proposed idea.