DES加密类，可以自定义key，可以更改IP置换表

pgp 软件源代码-PGP source code

windows2000以上自带的加密api-dpapi的使用例子.-windows2000 above onboard encryption api- dpapi examples of the use.

基于VC++6.0的DES加密算法 .-VC++6.0 based on the DES encryption algorithm .

鉴于单纯设置一个计数器易被查出，通过修改使其不起作用。我们设计的程序可以通过数据文件，软件执行前通过关键字找到计数基数，然后计算和判别，如果在合理范围，则设定新的关键字，将计数基数放在新关键字指定的位置，并执行子程序 则启动自毁程序。

对ORCLE数据库进行保护，具有很强的功能，有加密，访问，删除，等保护功能-right ORCLE database protection, and highly functional, encryption, access, deletion, such as the protection function

用C编程获取WPS的文件密码-C programming WPS access to the password file

The Advanced Encryption Standard (AES) specifies a FIPS- approved cryptographic algorithm that can be used to protect electronic data.  The AES-128 pipelined cipher module uses AES algorithm which is a symmetric block cipher to encrypt (encipher) information. This module is optimized for speed as it pipeline hardware to perform repeated sequence called round

Serpent加密算法源代码-Serpent encryption algorithm source code

RC2算法源代码-RC2 algorithm source code

简单的文件加密代码 一个不错的文件加密系统，对你工作的安全大大加强。-simple file encryption code a good file encryption system, you have the right security greatly enhanced.