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本文首先介绍了ＩＣ卡的概念和ＩＣ卡加密的内容，主要描述加密系统ＤＥＳ的算法和程序实现的主要流程，以及ＤＥＳ在ＩＣ卡加密中的运用。最后展望了ＩＣ卡加密的发展方向。
This paper first introduces the concept of IC card and IC card encryption, mainly describes the encryption system DES algorithm and program to achieve the main flow, as well as DES in the IC card encryption. Finally, the development of IC card encryption prospects.