智慧型行動裝置在現今已成為大多數民眾不可切割的伴侶，智慧型行動裝置的功能已經不僅僅是通訊的工具，隨著科技越來越進步，行動裝置如同小型電腦，可做資料上的處理。行動支付和小額支付在現今已越來越成熟，再加上行動網路的建設也越來越廣泛，讓大多數的地區都有網路可以使用，使民眾可透過手邊的行動裝置，隨時隨地進行支付。但隨著行動裝置的普及，有些民眾可能不只擁有一個行動裝置，可能同時擁有兩個以上的行動裝置。因此在本論文中，我們提出一個多裝置的小額付款機制，讓使用者不侷限在同一個行動裝置，在交易時不需有網路的連結，便可完成交易。利用Rivest與Shamir所提出的方法，使用雜湊函數，並重覆多次雜湊計算來產生電子錢幣鏈。並使用具有金鑰的雜湊函數，對資料進行加密，確保資料傳輸時的安全性，且分析所提出的付款機制電子付費的安全性問題。

Smart mobile devices have become more important for people in recent years. Smart mobile devices are not only communication tools, but also like small computers. Mobile payment and micro-payment has become more popular in these days because mobile network construction has been developed completely. People can use smart mobile device to pay whenever they want. Until now, payword-based micro-payment schemes have used payword chains of a single account from one device. However, the reality is that customers often have more than one mobile device. In this paper, we propose a “Same Digital-Coins Chains of a Single Account from Multiple Devices” scheme that customer can use multiple smart mobile devices to make an offline transaction. This scheme uses hash function to create the digital coin chains and use key hash function to guarantee data security. We also present the security analysis of the proposed scheme.

摘要 I
Abstract III
目錄 V
圖目錄 VII
第一章 緒論 1
1.1 研究動機與目的 1
1.2 論文概述 2
第二章 文獻探討 5
2.1 行動商務 5
2.1.1 行動商務 5
2.1.2 金融科技 6
2.2 雜湊函數 7
2.2.1 密碼雜湊函數 7
2.2.2 RSA加密演算法 7
2.3 單一錢幣鏈的小額付款機制 9
2.4 具有找錢能力的小額付款機制 13
第三章 客戶端多裝置單一帳號使用相同錢幣鏈之安全小額付款機制 19
第四章 系統實作 25
4.1 系統架構與流程 25
4.1.1 架構概述 25
4.1.2 註冊階段架構與流程 26
4.1.3 交易階段架構與流程 27
4.1.4 結帳與匯款階段架構與流程 28
4.2 系統實作與展示 29
第五章 安全分析 39
第六章 結論與未來工作 41
6.1 結論 41
6.2 未來工作 41
參考文獻 43

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