文件加密系统(使用DES算法给文件加密)

上传者: only_y | 上传时间: 2019-12-21 20:24:55 | 文件大小: 4.32MB | 文件类型: rar
文件加密系统是保护数据安全的重要工具,特别是在网络通信和存储敏感信息时。在这个项目中,我们专注于使用DES(Data Encryption Standard)算法实现文件加密。DES是一种广泛应用的传统对称密钥加密算法,它在1970年代由IBM开发,并被美国国家标准局(NIST)采纳为标准。 首先,我们要理解DES的工作原理。DES使用56位的密钥来对64位的数据块进行加密和解密。这个过程分为多个步骤,包括初始置换、16轮的Feistel网络和逆初始置换。每一轮都包含子密钥生成、数据替换和数据置换等操作,这些步骤确保了加密的复杂性和安全性。然而,由于其密钥长度较短,现代计算机的计算能力已经可以相对快速地破解DES,因此通常会采用更安全的版本如3DES(Triple DES)或非对称加密算法如RSA。 在这个文件加密系统中,用户可以将需要保护的文件输入到程序中,程序会使用DES算法生成一个密钥,然后用这个密钥对文件内容进行加密。加密过程通常是将文件读取成二进制数据,然后应用DES算法进行位操作,最后生成加密后的二进制文件。为了增加安全性,通常会推荐用户使用随机生成的密钥,并妥善保存,因为如果密钥丢失,将无法解密文件。 解密过程与加密相反,用户需要提供正确的密钥来恢复原始数据。系统接收到密钥后,会使用相同的DES算法进行解密操作,将加密的二进制数据还原为原始文件内容。这体现了DES算法的对称性,即加密和解密使用的密钥相同。 在网络安全领域,文件加密系统扮演着关键角色。它们能够防止未经授权的访问者获取和解读敏感数据,尤其在传输过程中,如电子邮件、云存储或网络共享。此外,这种加密软件在个人隐私保护、企业信息安全策略以及合规性要求(如欧盟的GDPR)中也具有重要意义。 在课程设计中实施这样的系统,不仅有助于学生深入理解加密算法的运作机制,还能提升他们实际编程和系统设计的能力。通过这样的实践,学生可以学习如何处理二进制数据、如何实现加密解密流程,以及如何设计用户友好的界面来交互和管理密钥。 总结起来,这个文件加密系统基于DES算法,为用户提供了一种简单但有效的文件保护手段。尽管DES在现代可能不被视为最安全的选择,但它仍然是学习加密原理和实现加密软件的宝贵案例。对于IT专业人员来说,理解并掌握文件加密技术是必备的技能,这有助于他们在未来职业生涯中应对各种安全挑战。

文件下载

资源详情

[{"title":"( 81 个子文件 4.32MB ) 文件加密系统(使用DES算法给文件加密)","children":[{"title":"文件加密系统","children":[{"title":"基于DES的简单文件加密解密系统","children":[{"title":"源程序","children":[{"title":"ReadMe.txt <span style='color:#111;'> 3.50KB </span>","children":null,"spread":false},{"title":"Minica.ncb <span style='color:#111;'> 281.00KB </span>","children":null,"spread":false},{"title":"StdAfx.h <span style='color:#111;'> 1.03KB </span>","children":null,"spread":false},{"title":"Minica.h <span style='color:#111;'> 1.55KB </span>","children":null,"spread":false},{"title":"res","children":[{"title":"Minica.rc2 <span style='color:#111;'> 398B </span>","children":null,"spread":false},{"title":"bk5.BMP <span style='color:#111;'> 19.65KB </span>","children":null,"spread":false},{"title":"city.BMP <span style='color:#111;'> 35.21KB </span>","children":null,"spread":false},{"title":"bk2.BMP <span style='color:#111;'> 19.65KB </span>","children":null,"spread":false},{"title":"bk1.BMP <span style='color:#111;'> 19.65KB </span>","children":null,"spread":false},{"title":"Main.ico <span style='color:#111;'> 6.70KB </span>","children":null,"spread":false},{"title":"badgename.BMP <span style='color:#111;'> 9.87KB </span>","children":null,"spread":false},{"title":"bk4.BMP <span style='color:#111;'> 19.65KB </span>","children":null,"spread":false},{"title":"bk3.BMP <span style='color:#111;'> 19.65KB </span>","children":null,"spread":false},{"title":"Zhulou.BMP <span style='color:#111;'> 7.40KB </span>","children":null,"spread":false},{"title":"Hand.cur <span style='color:#111;'> 326B </span>","children":null,"spread":false},{"title":"badge.BMP <span style='color:#111;'> 12.49KB </span>","children":null,"spread":false},{"title":"Key.ICO <span style='color:#111;'> 2.19KB </span>","children":null,"spread":false}],"spread":false},{"title":"Minica.aps <span style='color:#111;'> 128.07KB </span>","children":null,"spread":false},{"title":"CreditStatic.cpp <span style='color:#111;'> 28.16KB </span>","children":null,"spread":false},{"title":"Window.h <span style='color:#111;'> 1.67KB </span>","children":null,"spread":false},{"title":"Minica.dsp <span style='color:#111;'> 5.81KB </span>","children":null,"spread":false},{"title":"GfL.h <span style='color:#111;'> 1.24KB </span>","children":null,"spread":false},{"title":"MD5Checksum.h <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"AboutDlg.h <span style='color:#111;'> 1.58KB </span>","children":null,"spread":false},{"title":"Des.cpp <span style='color:#111;'> 15.19KB </span>","children":null,"spread":false},{"title":"Label.cpp <span style='color:#111;'> 4.49KB </span>","children":null,"spread":false},{"title":"MD5ChecksumDefines.h <span style='color:#111;'> 4.67KB </span>","children":null,"spread":false},{"title":"AboutDlg.cpp <span style='color:#111;'> 3.51KB </span>","children":null,"spread":false},{"title":"Debug","children":[{"title":"MyFileDialog.obj <span style='color:#111;'> 15.36KB </span>","children":null,"spread":false},{"title":"vc60.pdb <span style='color:#111;'> 372.00KB </span>","children":null,"spread":false},{"title":"FileInOut.obj <span style='color:#111;'> 7.78KB </span>","children":null,"spread":false},{"title":"FileInOut.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"Des.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"CreditStatic.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"Window.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"Minica.bsc <span style='color:#111;'> 3.16MB </span>","children":null,"spread":false},{"title":"GfL.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"Minica.pdb <span style='color:#111;'> 577.00KB </span>","children":null,"spread":false},{"title":"AboutDlg.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"CreditStatic.obj <span style='color:#111;'> 63.88KB </span>","children":null,"spread":false},{"title":"vc60.idb <span style='color:#111;'> 369.00KB </span>","children":null,"spread":false},{"title":"AboutDlg.obj <span style='color:#111;'> 19.22KB </span>","children":null,"spread":false},{"title":"Window.obj <span style='color:#111;'> 32.54KB </span>","children":null,"spread":false},{"title":"MyFileDialog.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"MinicaDlg.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"Minica.ilk <span style='color:#111;'> 407.92KB </span>","children":null,"spread":false},{"title":"StdAfx.sbr <span style='color:#111;'> 1.31MB </span>","children":null,"spread":false},{"title":"Label.obj <span style='color:#111;'> 27.20KB </span>","children":null,"spread":false},{"title":"Label.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"Minica.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"Minica.res <span style='color:#111;'> 107.74KB </span>","children":null,"spread":false},{"title":"Minica.exe <span style='color:#111;'> 288.14KB </span>","children":null,"spread":false},{"title":"StdAfx.obj <span style='color:#111;'> 103.09KB </span>","children":null,"spread":false},{"title":"GfL.obj <span style='color:#111;'> 9.08KB </span>","children":null,"spread":false},{"title":"MD5Checksum.obj <span style='color:#111;'> 29.07KB </span>","children":null,"spread":false},{"title":"Minica.pch <span style='color:#111;'> 6.75MB </span>","children":null,"spread":false},{"title":"Minica.obj <span style='color:#111;'> 18.26KB </span>","children":null,"spread":false},{"title":"MD5Checksum.sbr <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"Des.obj <span style='color:#111;'> 20.93KB </span>","children":null,"spread":false},{"title":"MinicaDlg.obj <span style='color:#111;'> 55.22KB </span>","children":null,"spread":false}],"spread":false},{"title":"Minica.plg <span style='color:#111;'> 2.21KB </span>","children":null,"spread":false},{"title":"FileInOut.h <span style='color:#111;'> 859B </span>","children":null,"spread":false},{"title":"resource.h <span style='color:#111;'> 1.92KB </span>","children":null,"spread":false},{"title":"Minica.clw <span style='color:#111;'> 2.26KB </span>","children":null,"spread":false},{"title":"CreditStatic.h <span style='color:#111;'> 3.58KB </span>","children":null,"spread":false},{"title":"Window.cpp <span style='color:#111;'> 8.12KB </span>","children":null,"spread":false},{"title":"FileInOut.cpp <span style='color:#111;'> 2.67KB </span>","children":null,"spread":false},{"title":"Des.h <span style='color:#111;'> 1.91KB </span>","children":null,"spread":false},{"title":"MyFileDialog.h <span style='color:#111;'> 1.16KB </span>","children":null,"spread":false},{"title":"MinicaDlg.cpp <span style='color:#111;'> 12.24KB </span>","children":null,"spread":false},{"title":"Minica.opt <span style='color:#111;'> 61.50KB </span>","children":null,"spread":false},{"title":"GfL.cpp <span style='color:#111;'> 5.56KB </span>","children":null,"spread":false},{"title":"StdAfx.cpp <span style='color:#111;'> 208B </span>","children":null,"spread":false},{"title":"Minica.rc <span style='color:#111;'> 7.35KB </span>","children":null,"spread":false},{"title":"MD5Checksum.cpp <span style='color:#111;'> 0B </span>","children":null,"spread":false},{"title":"Label.h <span style='color:#111;'> 2.04KB </span>","children":null,"spread":false},{"title":"MinicaDlg.h <span style='color:#111;'> 2.21KB </span>","children":null,"spread":false},{"title":"MyFileDialog.cpp <span style='color:#111;'> 2.45KB </span>","children":null,"spread":false},{"title":"Minica.cpp <span style='color:#111;'> 3.02KB </span>","children":null,"spread":false},{"title":"Minica.dsw <span style='color:#111;'> 535B </span>","children":null,"spread":false}],"spread":false}],"spread":true},{"title":"报告","children":[{"title":"数据安全课设报告.doc <span style='color:#111;'> 388.00KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}],"spread":true}]

评论信息

  • ahusmm2012 :
    这个是我看到最好的啦!谢谢哈!
    2015-08-19
  • chenxiaohy :
    非常好的,有用
    2014-03-27
  • dsp1024 :
    这个是我看到最好的啦!
    2013-10-07
  • 沉吟 :
    分有所值,挺好的一个程序和源码。只不过现在的猿们貌似都不太爱给源码加注释呢,可读性差了些
    2013-05-01
  • wasnbler :
    基本的应用都有了。。很好的学习工具。。
    2012-06-13

免责申明

【只为小站】的资源来自网友分享,仅供学习研究,请务必在下载后24小时内给予删除,不得用于其他任何用途,否则后果自负。基于互联网的特殊性,【只为小站】 无法对用户传输的作品、信息、内容的权属或合法性、合规性、真实性、科学性、完整权、有效性等进行实质审查;无论 【只为小站】 经营者是否已进行审查,用户均应自行承担因其传输的作品、信息、内容而可能或已经产生的侵权或权属纠纷等法律责任。
本站所有资源不代表本站的观点或立场,基于网友分享,根据中国法律《信息网络传播权保护条例》第二十二条之规定,若资源存在侵权或相关问题请联系本站客服人员,zhiweidada#qq.com,请把#换成@,本站将给予最大的支持与配合,做到及时反馈和处理。关于更多版权及免责申明参见 版权及免责申明