【作者】 赵静；

【导师】 郭文成；

【作者基本信息】 天津工业大学 ， 模式识别与智能系统， 2008， 硕士

【摘要】 随着计算机网络和通信技术的发展,信息安全已经成为一个国家信息技术水平的一个重要标志,各国投入大量的人力、物力、财力打造信息安全,个人和普通公司、企业对安全的需求也日益迫切。密码技术作为信息安全的核心,也越来越受到人们的普遍重视,成为一个热门的课题。密码产品应该自主研制和生产,是每一届政府和密码学界的共识,也是信息安全的根本。本论文结合硬件加密和软件加密的特点,设计了一个基于DSP芯片的移动存储设备的硬件加密系统。为普通用户提供了一种通用的安全性较好、性能较高的加解密解决方案。本课题设计的加密系统在PC机与U盘之间加入一个嵌入式系统,密钥存放在智能卡上,根据其中的密钥在预置的硬件加解密算法控制下,写盘时,实现数据加密;读盘时,实现数据解密。在算法的选择上,采用对称加密DES算法,为了得到更高的保密性,设计了三重DES算法,3-DES是DES的一个更安全的变形。为了获得更高的安全性,密钥是不相同的。这样,本质上就相当于用一个长为168位的密钥进行加密。在硬件架构中,选用计算和控制能力都比较出色的TMS320VC54X DSP作为主处理器,CH375芯片作为与USB接口通信的主控芯片,较好的完成了通信和加密的功能。在密钥处理中,随机序列发生器产生随机密钥,在IC卡初始化时存入,通过读卡电路读取,作为打开加密平台的钥匙。更多还原

【Abstract】 The development of computer networks and communication technology has raised the requirement for information security. The advance of information security reflects a country’s level in information technology. A significant amount of resources and money have been invested in information security worldwide. The demand for information security by individuals, companies and enterprises is increasing. Cryptologic technology, the core of the information security, has attracted a great deal of attention and it be comes a research area of interest.It has been widely accepted by each government and cryptologic experts that cryptologic product is the foundation of the information security and should be developed and manufactured by individual organization. This paper details the design of a hardware encryption system of Mobile storage devices based on DSP chip. The design provided a cryptologic solution with safer and higher protection level for the customer.This project added a embedded systems between the PC and the U-. The Keywords are storaged in the IC card. are prearranged m the outer raaio chip. According to the given Keywords, data encryption is carried out while writing disk, and data decryption is carried out while reading disk, under the preset algorithm of hardware encryption/decryption. In this article, it was adopt symmetric encryption DES (data encryption standard) algorithm, To achieve higher security, developed triple DES algorithm,3-DES is an upgrading of DES. To achieve higher safety, three keywords are set different from each other. Thus, in fact it equals encrypting with a 168-bit keyword. In hardware framework, adopted the TMS320VC54X DSP which is excellent in the calculating and controlling area as the main processor,CH375 as the control chip communicating with the USB interface, finished the communications and the encryption successfully. In dealing with the keyword,the Random Number Generators produced the Keywords,storaged in the IC card when initializtion,read through the card read circuit,as the key unclosed the encryption flat roof.更多还原