dsa加密算法，其中包含原理与源代码，可以学习下经典加密算法，脱壳时可能有用！-dsa encryption algorithm, which includes the principle and source code, you can study under the classical encryption algorithm may be useful when the shell!

通通过DSA算法的C编程说明加密算法的运用-Pass through the DSA algorithm in C programming note the use of encryption algorithms

?理解公钥密码及数字签名相关的基本概念 ?理解并能够编写RSA或DSA数字签名算法 ?熟练应用C++编程实现数字签名体制(To understand the basic concepts of public key cryptography and digital signature To understand and be able to write RSA or DSA digital signature algorithm Is proficient in C++ programm