{PDF} Web Information Systems ? WISE 2004: 5th International Conference on Web Information Systems Engineering, Brisbane, Australia, November 22-24, 2004. Proceedings Alistair Moffat, Justin Zobel (auth.), Xiaofang Zhou, Stanley Su, Mike P. Papazoglou, Maria Elzbieta Orlowska, Keith Jeffery (eds.)

We have described the development of a new micro-payment system, NetPay, f- turing different ways of managing electronic money, or e-coins. NetPay provides an off-line, anonymous protocol that supports high-volume, low-cost electronic trans- tions over the Internet. We developed three kinds of e-wallets to manage coins in a NetPay-based system: a sever-side e-wallet allowing multiple computer access to- coins; a client-side e-wallet allowing customer PC management of the e-coins, and a cookie-based e-wallet cache to improve performance of the client-side e-wallet c- munication overhead. Experiences to date with NetPay prototypes have demonstrated it provides an effective micro-payment strategy and customers welcome the ability to manage their electronic coins in different ways. References 1. Dai, X. and Lo, B.: NetPay ? An Efficient Protocol for Micropayments on the WWW. Fifth Australian World Wide Web Conference, Australia (1999) 2. Dai, X., Grundy, J. and Lo, B.: Comparing and contrasting micro-payment models for- commerce systems, International Conferences of Info-tech and Info-net (ICII), China (2001) 3. Dai, X., Grundy, J.: Architecture of a Micro-Payment System for Thin-Client Web App- cations. In Proceedings of the 2002 International Conference on Internet Computing, Las Vegas, CSREA Press, June 24-27, 444–450 4. Dai, X. and Grundy J.: ?Customer Perception of a Thin-client Micro-payment System Issues and Experiences?, Journal of End User Computing, 15(4), pp 62-77, (2003).