数位内容公平交易协定之正规验证-GEBRC.PDFVIP

資訊管理學報　第十六卷　專刊 153 數位內容公平交易協定之正規驗證 林熙禎 中央大學資訊管理研究所 鍾佑祥 中央大學資訊管理研究所 摘要 電子商務日漸普及，藉由網路進行電子交易亦為一種熱門新興的購物模式。但由於 此交易模式尚未成熟，雙方皆憂慮在虛幻的網路中損失自身權益，因此交易公平性之疑 慮成為電子商務發展瓶頸。近代學者提出許多公平交易相關協定，並以協定分析方式列 舉情境來證明協定滿足公平特性。然而，情境模擬的方式無法提供嚴謹之驗證，仍可能 有百密一疏的例外情況發生。因此本研究提供一個嚴謹且兼具效率的方式，使用正規驗 證(Formal Verification) 中模型檢測(Model Checking) ，運用CSP (Communicating Sequential Processes) 語言，針對欲檢驗的協定及公平特性進行建模(Modeling) ，再搭配FDR (Failures-Divergence Refinement) 以有限狀態自動機結構(Finite Automata-like Structure)的概 念做狀態集合的檢驗，偵測協定中的缺失，並檢驗協定是否完全滿足公平交易特性。 關鍵字： 線上交易協定、正規驗證、公平交易、電子現金、FDR 154 資訊管理學報　第十六卷　專刊 Formal Verification of a Fair: exchange Electronic Commerce Protocol for Digital Content Transactions Shi-Jen Lin Department of Information Management, National Central University Yo-Shang Chung Department of Information Management, National Central University Abstract Due to the growing popularity of e-commerce, electronic transactions through the Internet become one of the popular new shopping models. However, this model is immature enough to convince the participants that they won’t ever suffer the loss of money or interests through the virtual dealing, so the fairness become the sticking point of e-commerce. Actually, many researchers propose some fair-exchange protocol lately, but they prove the fairness of their protocols by simulation and test including a few inevitable exceptions which can’t provide a rigorous proof. Therefore, we provide a strict but efficient method by the mod