加密算法之DES算法

DES Algorithm of Encryption Algorithm

21世纪是信息时代,信息在社会中的地位越来越重要,已成为社会发展的重要战略资源,信息技术改变着人们的生活和工作方式,与此同时,信息安全也已成为世人关注的社会问题。本文介绍了保证信息安全的一种方法:数据加密标准(即DES),重点阐述单钥密码体制中的分组密码的基本概念、结构和加密算法。

21^st century is an information age. Information is playing more and more important role in society and has become a important strategic resource. Information technology changes our life and work style. At the same time Information security has become one of our important social problems. This paper introduces one method to ensure the information security .and mainly discusses the basic conception, structure and encryption algorithm of group key in single key crypto-system.