On analysis of the principle and application mode of des, a des module which fits for embedded security system such as IC card is realized by topdown design methods.
在详细分析DES的基本原理和应用模式的基础上，结合DES硬件实现的特点，采用正向设计的方法实现了适用于IC卡等有嵌入式安全需要的系统中的DES模块。
For the software, it mainly studies the implementation of contact-less IC card read-write course, the design of communication protocol between read-write module and host computer.
在软件方面重点研究了非接触式IC卡读写过程的实现，读写器与上位机的通讯协议设计。
The invention relates to a user identification module card slot. An IC card chip is arranged in the slot.
本发明涉及一种用户识别模块卡插槽，所述插槽内设置有IC卡芯片。
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