文档介绍：华中科技大学
硕士学位论文
密码学及其在HTTP通信代理中的应用
姓名:吴培林
申请学位级别:硕士
专业:系统分析与集成
指导教师:王乘
20040510
摘要
随着现代科学技术和社会的发展信息安全技术越来越被重视目前计算机已
经广泛的应用到各行各业计算机的应用给用户带来巨大的社会经济效益但同
时也给利用计算机犯罪的人提供了可乘之机网络通信安全电子商务等安全性问
题日益突出各国纷纷投入大力加快信息安全科学尤其是密码学的研究工作
本文主要分析了密码学技术的研究在此基础上实现了对信息文件的加密和
解密并将密码技术应用到 HTTP 通信代理中主要研究成果如下
1 对信息安全和国内外的研究状况做出介绍然后说明了本课题研究的内容
技术路线以及意义
2 主要叙说了密码学的概况密码的组成和分类并着重说明了近代加密体制
对公钥和私钥进行了比较,最后指出了两中不同的加密模式以及密码安全度量和密
码攻击方法
3 分析了 DES RSA, AES 等密码学算法的数学原理和实现机制并成功的利
用这些算法实现了对数据的加密和解密
4 分析 WEB 安全隐患以及安全对策同时分析了 WEB 访问服务过程和代理
模型针对这些情况使用 AES 算法在一台电脑上设计一种简单的 HTTP 通信代理
这种通信代理系统能保证信息在传输过程中即使被非法用户截获也能保证信息的安
全性和完整性

关键词通信代理信息安全密码学

I
Abstract
With the development of modern technology and the society, information security
has been emphasized by people. puter has been introduced to all kinds of areas.
puter has brought great economical benefits to society, and at the same time, has
also provided chances to those who puter mit crimes. The security of
munication, merce are urgent. All countries are trying their best to do
researches on information security, especially the cryptology.
This dissertation mainly analysizes the encryption, decryption technology. Based on
these technologies, the dissertation has encrypted and decrypted data and documents
essfully. The article also essfully applied AES into HTTP agent. The main
work are outlined as the following:
1) The information security knowledge both in China and foreign countries and the
situation of this project are been introduced firstly. And the contents, technology of the
article are also been introduced.
2) The dissertation analyzes the general situation of the cryptology, the classification
and the way to encrypt of cryptology. The article pares two different kinds of
encryption. Finally the dissertation introduces two modes to encrypt and the way to crack
cryptology.
3) The dissertation analyzes DES, AES and RSA, and applies these technologies into
encrypting and de