植基於智慧合約的數位內容交易電子支付方法

A Novel Electronic Payment Scheme Based on Smart Contracts for Digital Content Transactions

近年數位內容產業發展，大幅增加電子支付的消費行為，而傳統電子支付仰賴銀行及可信任第三方（Trusted Third Party, TTP）進行支付，存在使用者、銀行與第三方網路硬體安全、運行安全及數據傳遞安全，或資料遭竊取等問題。在以往研究中，數位內容商品交易透過非對稱式加密方式保障機密性，雖能保障參與者之匿名性，但卻不利於外部監管。因此，本研究在設計一套基於智慧合約的數位內容交易電子支付方法。具體貢獻簡述如後：(1)藉由自我認證機制產生之公、私鑰，進行身分驗證。(2)透過合約函式自動解決交易衝突，以降低第三方之參與。(3)讓生產者與賣家可同時依合約訂定之販售分潤比例收款，以激勵生產者創作意願。(4)提供交易紀錄分散式儲存服務，進而提高交易可信度。

In recent years, the development of the digital content industry has greatly increased the consumer behavior of e-payments (electronic payments). Considering the fact that the traditional e-payment methods relies generally on the banks and the trusted third parties (TTPs) for making payments, there inevitably exist various issues in the security of the network, operation and data transmission associated with the users, banks and TTPs, or in undergoing the risks of hacker activities to the databases. In previous studies, the confidentiality of digital content commodity transactions was protected by asymmetric encryption. Although it could protect the anonymity of participants, it was not conducive to external supervision. Therefore, the goal of this research is to design a novel electronic payment scheme based on smart contracts for digital content transactions. The specific contributions are: (1) authenticating identities through utilizing the public and private keys generated by the self-certification mechanism, (2) resolving transaction conflicts automatically through utilizing the contract functions, so as to minimize the participation of third parties, (3) allowing producers and sellers to collect payment concurrently according to the sharing ratio specified in the contract, so as to motivate producers to produce, and (4) providing distributed storage services for storing transaction records among participants to improve transaction credibility.