Design And Implementation Of Java Smart Card Runtime Environment

Java smart card technology is a new technology which is a combination of smartcard technology and Java technology.Java smart card technology will solve theproblems the traditional smart card can’t. They are the low utilization for codes, closingto the platform development and low integrated level of functions. Although Java smartcard market is still in its infancy, but the Java smart card’s features,“card multi-use”and “platform independent”, indicates that Java smart card is the mainstream of thefuture of the field of smart card products and R&D direction.Java smart cardspecification mainly consists of three parts: a Java smart card API, Java smart cardvirtual machine and runtime environment of Java smart cards. The current technicalstandard is a programmatic document that doesn’t give details. It gives the guidingprinciples of technical standards how to build a qualified Java virtual machine smartcard. So, the main problem to design a Java smart card is to build the Java smart cardenvironment Java smart cards running under the premise of ensuring the efficiency ofJava smart card.This thesis is focused on two points, the JCVM and the JCRE. It gives a reasonablemodel design for JCVM and JCRE based on the key technology. The JCVM mainlyrelates to the run-time stack and the stack frame structure, the command interpreter andthe support for the int data type. The JCRE mainly relates to the APDU controller, thefile downloads and the file manager.The last of the current round of the text gives a platform designed for testingpurposes. The designed JCRE system is ported to the platform on functional testing. Atlast, the result of the tests further proves that the design of JCRE and JCVM is rational.