数字签名（完整代码）

为一个字节或字符数组或串计算md5值，内部只创建一个数组，节省分配时间，节省内存 完全是static方法，线程安全 注意对返回值的处理，见注释-for a byte array or character string or md5 value calculation, only to create an internal array, saving time allocated to save memory is completely static method, thread-safe attention to the return value, see note

程序实现了大素数的判断和如果不是素数，则其可分解的最小的素数-program of large prime numbers and if the judgment is not prime, then decomposition of the smallest prime number

此小程序是MD5的加密算法，里面有详细的注释！-This small program is MD5 encryption algorithm, there are detailed notes!

数据加密用C#做的加密程序,望各位多提问题-data encryption using C# do encryption, and hopes to raise the issue

C++的一个MD5加密算法。对需要加密的接口非常有用的-C++ An MD5 encryption algorithm. The need for encryption interface very useful

access数据库加密有几法，但用“设置安全机智向导”加密最为牢靠，又如何访问这样的数据库呢-access database encryption with a few laws, but "to provide a safety witty guide" the most secure encryption, how to access such a database?

计算文件hash值的源代码，包含crc,md2,md4,md5,sha,sha1,sha256,ra-Calculated hash value of document

微软cryptapi文档-Microsoft cryptapi document

RC4算法的Asm实现，实现效率高，可以很方便的用到工程中去-Asm achieve RC4 algorithm to achieve high efficiency

Introduction to Cryptography in plain simple english. The document talks about the early day cryptography and gives some simple examples to the readers.