Cryptography-and-Network-Security

快速取模指数算法，C++编写，下载即可编译运行，RSA算法里面需要用到的(Take the fast modular exponentiation algorithm, C++ to prepare, you can compile and run the download, the RSA algorithm which need)

DES加密的雪崩效应分析，按照作业要求做的。(DES encryption of the avalanche effect analysis, done in accordance with operational requirements.)

shiftcipher加密解密算法实例 使用shiftcipher算法加密字符串 可输入任意密钥(shiftcipher examples of encryption and decryption algorithms String encryption algorithm using the shiftcipher Can enter any key)

文件的加密传输，用到了各种加密算法 MD5 RSA (File encryption MD5 RSA )

说明：  ECC实现加密解密功能，系统参数的生成！(ECC to achieve encryption and decryption functions, system parameter generation!)

生成RSA密钥，将密钥生成后`，存入文件中(RSA key generation, key generation `stored in the file)

OpenSSL的RSA算法应用举例。是用VC写的，有实用价值。(RSA algorithm of OpenSSL is used and given an example. Written with VC, there is practical value. )

检测CRC编码 看CRC编码在传输后是否有错误 有变动 (Detection CRC codes to see whether the CRC coding errors in the transmission there is a change)

编写的DES 对称加解密技术，可随时进行明文密文之间的转换，有需要的朋友可以下载测试！本人目的打算对后台数据库的敏感信息字段用该方法加密，然后用软件权限控制读取，这样即使直接SQL后台取数，也得不到明文数据。(Write DES symmetrical encryption technology, may at any time for conversion between plaintext cipher, friends in need can be download test! I purpose going to the backstage database of sensitive information field with the method of encryption, and then use software to read access control, so even if the SQL backend access directly, also can not get clear data. )

VC编写的简单DES加密程序，密钥由用户手动输入，可加密字符串(VC prepared by the simple DES encryption program, the key to manually input by the user)