Simply put, the so-called digital signature is attached to the data unit on some data, or data unit by changing the password. Such data or transform data unit to allow the recipient to identify the source of the data unit and data unit and protect the integrity of data, to prevent people (such as the receiver) for forgery.

Digital_Signature
.................\Bos_Chaum_Signature
.................\...................\Bos_Chaum.cpp
.................\...................\Bos_Chaum.dsp
.................\...................\Bos_Chaum.dsw
.................\...................\Bos_Chaum.ncb
.................\...................\Bos_Chaum.opt
.................\...................\Bos_Chaum.plg
.................\...................\Debug
.................\Digsig
.................\......\BigInt.cpp
.................\......\BigInt.h
.................\......\CersigDlg.cpp
.................\......\CersigDlg.h
.................\......\Debug
.................\......\Digsig.aps
.................\......\Digsig.clw
.................\......\Digsig.cpp
.................\......\Digsig.dsp
.................\......\Digsig.dsw
.................\......\Digsig.exe
.................\......\Digsig.h
.................\......\Digsig.ncb
.................\......\Digsig.opt
.................\......\Digsig.plg
.................\......\Digsig.rc
.................\......\DigsigDlg.cpp
.................\......\DigsigDlg.h
.................\......\GenkeyDlg.cpp
.................\......\GenkeyDlg.h
.................\......\GensigDlg.cpp
.................\......\GensigDlg.h
.................\......\ReadMe.txt
.................\......\res

.................\......\...\Digsig.rc2
.................\......\resource.h
.................\......\Rsa.cpp
.................\......\Rsa.h
.................\......\sha.cpp
.................\......\sha1.c
.................\......\sha1.h
.................\......\StdAfx.cpp
.................\......\StdAfx.h
.................\XieJD
.................\.....\DigestPass.class
.................\.....\DigestPass.java
.................\.....\eagleCA.cer
.................\.....\eagleCA_Signed.cer
.................\.....\MyMac.class
.................\.....\MyMac.java
.................\.....\rootCA.cer
.................\.....\rootCALib
.................\.....\SignCert.class
.................\.....\SignCert.java
.................\.....\SignedLib
.................\.....\XieJD.txt

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