Java智能卡EEPROM碎片整理算法

An EEPROM Defragmentation Algorithm on Java Smart Card

摘要: Java智能卡已经被广泛应用于金融、通信等安全性要求很高的领域。但是受限于当前智能卡的硬件资源，特别是多应用智能卡的流行，卡片的存储资源越来越受到重视，Java卡虚拟机的具体实现方式和相关机制也严重影响了卡片的执行效率。通过分析Sun公司Java卡规范算法，总结出现有算法的一些缺陷，对EEPROM的结构重新设计，提出一种带碎片整理的EEPROM存储管理算法。

Abstract: Java smart card is widely used in the highly security fields such as bank, social security etc. Because the hardware resources of the smart card are limited, and especially the multi-application smart card is popular, the card’s storage resources have been paid more and more attention. The implementations and related mechanisms of Java Card virtual machine are also seriously affecting the efficient of the card. This paper analyzes the management methods that Sun Inc. has given of the Java Card’s EEPROM, finds the disadvantages of the existing methods, redesigns the EEPROM structure, and at last designs a new management algorithm that include EEPROM’s defragmentation.