DES algorithm is divided into 64-bit plaintext data block size, number of that packet length is 64, while using 56-bit key for 64-bit plaintext message encryption and eventually the formation of 64-bit ciphertext. If the plaintext length less than 64, then it is extended to 64-bit (for example, zero-padding and other methods).

C实现DES加密与解密\DES加脱密\Debug\DES.exe
..................\.........\.....\DES.ilk
..................\.........\.....\DES.obj
..................\.........\.....\DES.pch
..................\.........\.....\DES.pdb
..................\.........\.....\DES.res
..................\.........\.....\DESDlg.obj
..................\.........\.....\DESDlg.pch
..................\.........\.....\DESDlg.pdb
..................\.........\.....\DES加脱密.exe
..................\.........\.....\StdAfx.obj
..................\.........\.....\vc60.idb
..................\.........\.....\vc60.pdb
..................\.........\DES.APS
..................\.........\DES.clw
..................\.........\DES.cpp
..................\.........\DES.dsp
..................\.........\DES.dsw
..................\.........\DES.h
..................\.........\DES.ncb
..................\.........\DES.opt
..................\.........\DES.plg
..................\.........\DES.rc
..................\.........\DESDlg.cpp
..................\.........\DESDlg.dsp
..................\.........\DESDlg.dsw
..................\.........\DESDlg.h
..................\.........\DESDlg.ncb
..................\.........\DESDlg.opt
..................\.........\DESDlg.plg
..................\.........\ReadMe.txt
..................\.........\res\DES.ico
..................\.........\...\DES.rc2
..................\.........\...\Thumbs.db
..................\.........\Resource.h
..................\.........\StdAfx.cpp
..................\.........\StdAfx.h
..................\...短块处理\Debug\DES.ilk
..................\...........\.....\DES.obj
..................\...........\.....\DES.pch
..................\...........\.....\DES.pdb
..................\...........\.....\DES.res
..................\...........\.....\DESDlg.obj
..................\...........\.....\DESDlg.pch
..................\...........\.....\DESDlg.pdb
..................\...........\.....\DES短块处理.exe
..................\...........\.....\StdAfx.obj
..................\...........\.....\vc60.idb
..................\...........\.....\vc60.pdb
..................\...........\DES.APS
..................\...........\DES.clw
..................\...........\DES.cpp
..................\...........\DES.dsp
..................\...........\DES.dsw
..................\...........\DES.h
..................\...........\DES.ncb
..................\...........\DES.opt
..................\...........\DES.plg
..................\...........\DES.rc
..................\...........\DESDlg.cpp
..................\...........\DESDlg.dsp
..................\...........\DESDlg.dsw
..................\...........\DESDlg.h
..................\...........\DESDlg.ncb
..................\...........\DESDlg.opt
..................\...........\DESDlg.plg
..................\...........\ReadMe.txt
..................\...........\res\DES.ico
..................\...........\...\DES.rc2
..................\...........\...\Thumbs.db
..................\...........\Resource.h
..................\...........\StdAfx.cpp
..................\...........\StdAfx.h
..................\可执行文件\DES加脱密.exe
..................\..........\DES短块处理.exe
..................\..........\DES随机性测试.exe
..................\..........\弱密钥检测.exe
..................\密码课设实验报告.doc
..................\弱密钥检测\Debug\DES.exe
..................\..........\.....\DES.ilk
..................\..........\.....\DES.obj
..................\..........\.....\DES.pch
..................\..........\.....\DES.pdb
..................\..........\.....\DES.res
..................\..........\.....\DESDlg.obj
..................\..........\.....\DESDlg.pch
..................\..........\.....\DESDlg.pdb
..................\..........\.....\StdAfx.obj
..................\..........\.....\vc60.idb
..................\..........\.....\vc60.pdb
..................\..........\.....\弱密钥检测.exe
..................\..........\DES.APS
..................\..........\DES.clw
..................\..........\DES.cpp
..................\..........\DES.dsp
..................\..........\DES.dsw
..................\..........\DES.h
.........

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