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    題名: 以智能合約實現分散式電子投票與投標系統
    Distributed E-Voting and E-Bidding Systems Based on Smart Contract
    作者: 蕭人和
    Hsiao, Jen-Ho
    貢獻者: 左瑞麟
    Tso, Raylin
    蕭人和
    Hsiao, Jen-Ho
    關鍵詞: 區塊鏈
    秘密共享
    電子投票
    同態加密
    智能合約
    分散式
    Blockchain
    Secret-sharing
    E-voting
    Homomorphic
    Smart contract
    Distributed
    Paillier encryption
    日期: 2017
    上傳時間: 2017-10-02 10:16:38 (UTC+8)
    摘要: 區塊鏈有著不可否認性、可追溯性以及共識性等特點,所有的交易內容都會完整的被記錄在區塊鏈上,基於上述幾項特性,我們利用區塊鏈來記錄公開資訊,將私密資料經由分散式秘密共享後再加密存放於智能合約中。其中,智能合約是一個能將交易狀態和交易狀態內嵌於區塊鏈上的應用,透過智能合約作為媒介,我們能夠將加密後的私密資料完整的存放於區塊鏈上,最後經由區塊鏈網路上的節點驗證後,達到資料正確性驗證的目的。
    本研究分析現有的電子投票以及電子投標等應用的系統架構後,發現兩者皆存在著可信賴的第三方進行開票及開標的角色,且驗證流程繁瑣,無法提供一個便利性的投票與投標流程。此外,上述兩種應用皆須滿足機密性、不可否認性、匿名性以及可驗證性等安全性質,若能結合區塊鏈與智能合約於上述應用中,將可提升資料的可驗證性以及降低成本的負擔,對參與應用的人而言也能達到公開透明的需求。
    因此,本文提出一個分散式架構下的電子投票與投標機制,結合區塊鏈以及智能合約的優點與技術,讓所有參與投票的選民、投標的廠商共同參與驗證與計算,並加強參與者的匿名性、資料傳輸的隱私性、開票與開標階段資料的可信賴性以及可驗證性。
    With the rise of blockchain technology, the core concept of decentralization has
    gradually drawn attention. In this context, the main objective of this study is to realize
    more convenient and secure electronic applications with the use of blockchain technology.
    This research is aimed to design a distributed e-voting and e-bidding system. The core idea is to combine the blockchain technology with secret sharing scheme and homomorphic encryption in order to realize the distributed e-voting and e-bidding application without a trusted third party. The system allows voters to participate in opening phase. It provides a public and transparent process while protecting the anonymity of voter’s and vendor’s identity, the privacy of data transmission and verifiability of data during the opening phase.
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    [29] 蕭勝文, “電子競標系統之研究” 中央大學資訊工程所碩士班學位論文,2003.
    [30] 行政院公共工程委員會,政府採購領投標系統:http://www/geps.gov.tw
    [31] 政治大學選舉研究中心, “實施電子投票成本效益分析架構之研究─以日本、韓國與菲律賓電子投票、韓國與菲律賓電子投票推動情形為例”
    描述: 碩士
    國立政治大學
    資訊科學學系
    104753015
    資料來源: http://thesis.lib.nccu.edu.tw/record/#G0104753015
    資料類型: thesis
    顯示於類別:[資訊科學系] 學位論文

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