是用的美国标准的DES加密算法用C++编写的可以完成以内的字符垢加密-the United States is using the DES encryption standard algorithm with C prepared to be completed within the characters scale encryption

playfair 加密算法的java实现，使用密码学的学生学习参考-Playfair encryption algorithm to achieve the java, the use of cryptography reference to student learning