数据加密技术的设计与应用.doc

论文题目：数据加密技术的设计与应用 摘要 在竞争激烈的信息时代,信息不仅给我们带来很大的方便,同样,信息也可以用来对他们构成威胁、造成破坏。因此,在客观上就需要一种强有力的安全措施来保护机密数据不被窃取或篡改,数据加密技术就应运而生。所谓数据加密技术是指将一个信息经过加密钥匙及加密函数转换,变成无意义的密文,而接收方则将此密文经过解密函数、解密钥匙还原成明文。加密技术是网络安全技术的基石。 所谓加密,就是把数据信息即明文转换为不可辨识的形式即密文的过程,目的是使不应了解该数据信息的人不能够知道和识别。将密文转变为明文的过程就是解密。加密和解密过程形成加密系统,明文与密文统称为报文。任何加密系统,不论形式如何复杂,实现的算法如何不同,但其基本组成部分是相同的。 本文是一篇讨论关于常用文件加密解密算法的毕业设计论文，它详细的讲述了文件加密解密算法实现的过程中所用到的方法、技术。对公钥密码体制和私钥密码体制进行了分析和研究，并对公钥密码体制和私钥密码体制的代表RSA算法和DES算法进行了研究和比较。 关键词 解密 文件加密 密码体制 DES RSA Abstract In the fierce competition in the information age, information not only bring us a lot of convenience, the same, the information can also be used to pose a threat, they cause damage. Therefore, in which they need a strong security measures to protect confidential data is not theft or falsified, data encryption technology is made. The so-called data encryption technology refers to an information encrypted key and encryption function conversion, become meaningless ciphertext, and receiving party will the ciphertext after decryption function, decryption key reduction into plaintext. Encryption technology is the foundation of network security technology. The so-called encryption, data is the information that is not expressly converted to the form of identification is ciphertext process, the purpose is to make should not understand the data information of people cant know and identification. Will ciphertext into plaintext process is decryption. Encryption and decryption process forms encryption system, plaintext and ciphertext collectively referred to as message. Any encryption system, no matter how complex form, the algorithm is realized how different, but the basic component is the same. This paper is a discussion about the common file encryption decryption algorithm graduation design paper, it detailed tells the story of file encryption decryption algorithm used in the process of the method and technology. To public key cryptosystems and private key cipher syst