Trade security is the main point of the payment system. The system should fit the security issues such as confidentiality, authentication, and non-repudiation. However, the privacy problem seems to be ignored. This article proposes a new structure to improve the privacy of mobile payment system when consumers buy something via mobile device. The new system needs to fit three points: familiarity, privacy, and non-repudiation.
Sue, Kuenliang and Hsieh, Wanpu, "Mobile Payment System with Privacy Protection" (2004). ICEB 2004 Proceedings (Beijing, China). 146.