这个是RSA加密算法C源程序，希望对需要的朋友有所帮助

playfair的源代码，很简洁，跟网上现存的版本有所差异，但是效果是很不错的。-playfair source code is very simple, with the existing version of the web is different, but the effect is very good.

DES加密代码，是研究密码加密的基础，希望大家能有所收获-DES encryption code, password encryption is to examine the basis for hope that we can gain

JAVA加密算法之一-JAVA encryption algorithm

a sample algorithm of rsa in langage C-a sample algorithm of rsa in langage C++

CRC32 check

RSA资料全集是我在学习RSA时收集的资料，它对我学习这种算法有着极大的帮助，不知对大家有帮助没有，希望对大家学习密码学有所帮助。-All of the information of RSA was collected when i was studying RSA.It gives me a great deal of help though i don t know how about you.I wish it also give you some help about the cryptology.

生成程序序列号在程序加密方面几好用-sequence generation process, the procedure uses encryption several areas

数据库安全至关重要，尤其是Access数据库，由于其加密算法过于简单，使得Access单靠密码无法保证其安全，本代码通过改变数据库头文件实现对Acess数据库的加密。-Database security is crucial, especially the Access database, because of its too simple encryption algorithm, making Access a password alone can not guarantee their safety, the code by changing the header file database achieve Acess database encryption.

AES算法主要包括三个方面：轮变化、轮数和密钥扩展。本文以128为例，介绍算法的基本原理；结合C语言，实现高级数据加密算法AES（AES-128）。-AES algorithm mainly includes three aspects: round of changes, round number and key expansion. In this paper, 128 for example, introduce the basic principles of algorithm combination of C language, the realization of advanced data encryption algorithm AES (AES-128).

des算法的java实现-des algorithm to achieve the java