Secure e-cash model using Java based smartcard

Association of a true observer guaranties electronic cash not to be double-spent by any means. Java card is a smartcard which represents one of the smallest computing platforms. A major challenge influencing the design and implementation of e-cash observer in Java card is the limited availability of computing resources in it. In this paper, we show a new methodology of blending and associating high-level CORBA based bank server, user wallets and resource-constrained Java based observer. We choose a realistic e-cash scheme and show its successful implementation. We also analyze performance of Java card with various lengths of secret keys used for generating electronic coins.