DD_PassWord

实现维吉尼亚密码，用键盘接收明文和密钥，屏幕打印密文和解密后的明文。 可以实现：大小写敏感，明文小写则密文大写，明文大写则密文小写输出，注意输入的健壮性控制，明文字符超出字符集后保留原文(Virginia to achieve the password, use the keyboard to receive the plaintext and the key, the screen printing ciphertext and the decrypted plaintext. Can be achieved: case sensitive, then the ciphertext plaintext lowercase uppercase, lowercase plaintext ciphertext output is capital, pay attention to the robustness of the control input, plaintext characters out retain the original character set)

帮助开发出来的程序加密和解密！采用MD5算法，即时数据库中被人盗窃，也不能得到用户登录密码(Developed procedures to help encrypt and decrypt! Using MD5 algorithm, real-time database which has been stolen, nor can the user login password)

基于RSA算法的加密解密以及数字签名系统，实现加密解密签名的功能(RSA-based encryption and decryption algorithms and digital signature system to achieve the function of signature encryption and decryption )

加解密算法的实现，内部包含有多个加解密算法的实现，(Encryption and decryption algorithm, contains a number of internal encryption algorithm,)

题目：某个公司采用公用电话传递数据，数据是四位的整数，在传递过程中是加密的，加密规则如下： 　　　 每位数字都加上5,然后用和除以10的余数代替该数字，再将第一位和第四位交换，第二位和第三位交换。 1.程序分析： 2.程序源代码：(Topic: a company USES the public telephone relay data, data is four integers, in the relay in the process is encrypted, encryption rules are as follows: Each Numbers add 5, then use and divided by the number of 10 instead of a remnant, then the first and fourth exchange, the second and third exchange. 1. The program analysis: 2. The source code:)

基于miracl大数库的椭圆曲线EC的签名算法的c语言实现(Database based on large numbers miracl elliptic curve signature algorithm EC for c-language implementation)

atmel系列加密芯片资料，ATSHA204芯片手册。希望对编写驱动的朋友有所帮助！(Atmel series data encryption chip, manual ATSHA204 chip. Hope to write a driver for friends to help!)

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 !)

分析RSA算法的应用现状，论证文件加密应用RSA算法的可行性和意义。设计一套完整实用的RSA文件加密解决方案，具体编码实现。对RSA算法进行研究，从常规RSA算法出发，用C++实现RSA加密算法类库，并在32位windows平台封装成组件。在.Net平台引用此组件，实现可以对任意文件进行RSA加密 (Analysis of Application of RSA algorithm, file encryption application demonstration of the feasibility of RSA algorithm and significance. Design of a complete file encryption RSA practical solutions to achieve specific coding. Research on the RSA algorithm, starting from the conventional RSA algorithm using C++ class library to achieve RSA encryption algorithm, and in 32-bit windows platform components into a package. In. Net platform, referred to this component, the realization of arbitrary files on RSA encryption)

说明：  idea算法VC++源码，包含系列文件 idea.h idea.cpp ideadlg.h ideadlg.cpp resource.h stdafx.h stdafx.c(idea algorithm VC++ source, including the series of documents idea.hidea.cppideadlg.hideadlg.cppresource.hstdafx.hstdafx.c)