采用CPU卡和SAM安全模块的通用智能卡表预付费系统的设计

Design of universal smart card meter prepaid expenses system with CPU and SAM module

主要以预付费电表为例，从系统的结构、功能、实施、安全性等几个方面详述了通用智能卡表的设计。CPU卡和SAM安全模块的结合使用大大提高了系统的安全性，采用一张CPU卡可完全实现水、电、气三表的一卡多用。

：With the example of prepaid electric meter，universal smart card meter is expounded in detail from the system structure，function，implement and security．System security is highly improved because of the combination of the CPU card and the SAM module．One card multi－purpose can be realized with only one piece of CPU card．