dct_2

这个是编译通过的MD5算法，使用的语言是C++，非常好用。(MD5 C++ source code )

AES算法C源码-AES C source

凯撒密码作为一种最为古老的对称加密体制，在古罗马的时候都已经很流行，他的基本思想是：通过把字母移动一定的位数来实现加密和解密。例如，如果密匙是把明文字母的位数向后移动三位，那么明文字母B就变成了密文的E，依次类推，X将变成A，Y变成B，Z变成C，由此可见，位数就是凯撒密码加密和解密的密钥。个人原创。(Caesar password as one of the most ancient symmetric encryption system in ancient Rome have been very popular, his basic idea is: by the letters move a certain number of bits to achieve encryption and decryption. For example, if the key is the number of bits of plaintext letters backward move three, the plaintext letter B into a ciphertext E, and so on, X will become Y-become a B,, and Z becomes C Thus, the median is the Caesar cipher encryption and decryption keys. Personal originality.)

使用crypt api创建一个会话密钥。 在这个例子中使用了一个168位的3DES key-use crypt api to create a session key. In this example the use of a 168 DES key 3

RSA算法，主要讲述算法的原理和过程，设计到加密解密，和溢出处理，初级学习RSA用(RSA algorithm, the algorithm mainly about the principle and process design to the encryption and decryption, and overflow processing, the primary study used RSA)

sm2签名验签C语言源码，供大家学习之用(sm2 sign verify,it can work correctly.)

MD5 Checksum Calculator source codes

在网络上销售的商业管理系统，一般都要注册才能使用。本实例将使用INT文件对软件进行用户信息注册。-On the network marketing business management systems, generally have to register to use. INT files in this instance will use the software user information registration.

PE程序加密壳源程序 -PE procedure encryption shell source program

TEA算法的python实现，TEA是腾讯QQ用到的加密算法，很有价值，呵呵(Realization the TEA algorithm of python, TEA encryption algorithm used in Tencent QQ, valuable, Oh)