| Summary: | 碩士 === 國立臺灣科技大學 === 資訊管理系 === 96 === Along with the development of Information Technology, the portability and efficiency of mobile devices and the bandwidth of mobile networks have been improved. Also, the mobile services have been diversely provided. Due to the convenience, mobile payment will become the main payment method for on-line transaction. Current researches rarely focus on the issue of the fair mobile payment systems. When the electronic transaction disputes, participants must manually resolve disputes through the trust party (i.e. the court), and cannot automatically resolve disputes immediately. Besides, in order to avoid revealing the buyer’s shopping behavior and habits during the transaction, the buyer’s identity must be hided. Hence, because of the above situations and the limitation of mobile device's computing power and wireless network bandwidth, how to design a lightweight fair mobile payment system to accomplish the same security level is becoming more and more important. In our proposed scheme, we propose a fair mobile payment protocol based on the ellipse curve cryptosystem and the self-certified public key system to reduce computing complexity and communication cost and maintain transaction fairness by off-line trusted third party. Our proposed scheme can achieve (1) Optimistic protocol；(2) Strong fairness；(3) On-line automated dispute resolution；(4) Anonymity of the buyer；(5) Non-impersonation；(6) Non-repudiation；(7) Forward security；(8) Elimination of key management issues for TTP；(9) Preventing the reuse of the authorized payment.
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