介绍了一种采用加密存储器卡和单片机的IC卡预付费燃气表的设计方案，着重讨论了设计工作中的低功耗和安全性问题。
This paper introduced a prepaid gas meter which adopts an encrypted memory intelligent card ( IC ) and a chip microcomputer . Low power consumption and security are mainly discussed in the process of designing .
加密存储器卡