基于C#的文档加密器的实现-无忧无虑毕设网.doc

本文配套程序下载地址：无忧无虑毕设网()-大学生毕业设计站,免费毕业设计论文,无忧无虑毕设网大学生毕业设计,出售各类毕业设计源码,论文,程序源码,网站源码,免费视频教程,我们将竭诚为您服务！ 基于C#的文档加密器的实现DES加密器；ASP.NET (C#)；文件加密；文件解密 The Implementation of a Document Encrypter Based on C# Abstract With the rapid development of the computer and communication technologies， large mount of sensitive information are exchanged on the public communications facilities or computer networks. Especially under the situation of the widespread of the Internet applications， such as E-commerce and E-government， more and more information， such as bank account numbers， personal privacy， need to be encrypted. Such requirement for the secrecy and authenticity makes it necessary to develop an encrypter to encrypt the sensitive information. This system， developed with ASP.NET (C #)， primarily includes such functions as setting the password of the document to be encrypted， encrypting the document， verifying the decryption password and decrypting the document. What needs to expand include encrypting and decrypting the network data or data on hosts; packaging data on the Internet and implementing encrypted transmission; replacing partial text in encrypted document. Besides， keys need to be transmitted on the safety channel because key management is the critical safety factor of the entire document. Users can protect their important data and prevent the unauthenticated persons from stealing the information by using the entrypter. Encryption is the key means to protect the important information， and decryption is to restore the encrypted data to make it readable. Key words: The DES encrypter; ASP.NET ( C#); Document encryption; the Document decryption目 录 论文总页数：22页 1引言 １ 1.1课题背景 １ 1.2 国内外研究的现状 １ 1.2.1公钥密码 １ 1.2 .2分组密码 ２ 1.2.3 序列密码 ２ 1.2.4认证码 ３ 1.2.5数字签名 ４ 1.3本课题研究的意义 ４ 1.4 本课题的研究方法 ４ 2 DES算法描述 ４ 2.1 DES ４ 2.2 DES算法详述 ５ 2.3算法的编程实现 ８ 2.4 DES算法的应用误区及避开方法 １０ 3软件设计与实现 １１ 3.1 程序结构图 １１ 3.2关键代码的设计 １２ 3.3开发完成程序调试截图 １７ 4测试 ２０ 4.1加密方面的测试实验用例 ２０ 4.2解密方面的测试实验用例 ２０ 结 论 ２０ 参考文献 ２０ 致 谢 ２１ 声