ERRATA

对txt文件的加密解密，采用c++编写。(The encryption and decryption of the txt file, using c ++.)

今天我们学习了des对称加密算法这是一个des算法的C++实现(This is a des !)

Base64的编码程序 基于VC++编写的(Base64 encoding program written with VC++)

VMp——一款可以超强保护文件防止破解的加壳工具，软件设计员的绝佳伴侣！ (VMp- a super-protected files can be packed to prevent cracking of the tools, software designers the perfect partner!)

一个袖珍的vc++加密软件，同时还可以解密，加密文件的范围挺大的，几乎所有文件都可以加密，输入密码并解密，好像不是真正意义的加密，只不过是用文件额外加密的方法进行加密，较早时候的程序，不过编译还是顺利的。 (A pocket-sized vc++ encryption software, but also can decrypt encrypted files the scope of getting bigger, almost all the files can be encrypted, enter the password and decrypt the encryption does not seem real, but the file is an additional method of encryption to encrypt Earlier procedures, but the compiler is still smooth.)

这是一个小程序,凯撒解密,自己写的,以后还会扩展的(This is a simple program for a example of ceasar cipher. It is produced by myself and I want to extend it to a substitution cipher program in some days.)

说明：  采用RCS做文件加密的源程序代码，VC环境。包含两个文件包，里面的Readme有详细介绍。(Using RCS to do file encryption source code, VC environment. Package consists of two documents, which detailed the Readme.)

DES 算法描述DES 算法描述DES 算法描述(DES algorithm description)

Shamir门限算法的C++实现，依赖于NTL开源代码库(Shamir threshold algorithm C++ implementation, relies on NTL open source code base)

文件加密使用,可以实现对PC上文件进行加密解密功能(document encryption use, the PC can be achieved on the document encryption and decryption functions)