I found five des algorithm.

c51-----des --- 可以完成加密解密等功能，测试通过没问题-c51----- des------ to be completed, such as encryption and decryption functions, the test No problem! ! !

pgp 软件源代码-PGP source code

用C语言求解经典逻辑推理题-Solving with C language that classical logic

该程序是使用恺撒密码和transposotion密码。也许这个计划太简单了，但总比没有强。：V

一个小的网页加密器-a small website encoder

笔者长期从事移动通信系统的无线链路调制与解调、物理层实现方面的工作。在移动通信GSM系统中，我们进行语音或者业务信道解调时，都会遇到CRC的求解。通常在硬件DSP实现时，特别是40位CRC求解时候，由于生成多项式有41项，DSP最大一次能处理40位，所以使用单个寄存器会遇到一些困难，那么以下这个程序将会解决这一困难（这是针对定点DSP、C55xx的编程实现方法）。-The author has long been engaged in mobile communication system modulation and demodulation of wireless links, the physical layer to achieve work. GSM in the mobile communications system, we have a voice or channel demodulation operations, it will encounter the solution of CRC. DSP hardware usually realize, especially when solving the 40 CRC, as the generation polynomial has 41, DSP can handle the largest 40, so using a single register may encounter some difficulties, then following this process will solve this One difficulty (which is for fixed-point DSP, C55xx realize programming methods).

rda加密源代码-The source code of RSA encryption algorithm

RC5算法的C++实现-RC5 algorithm to achieve C

一个JAVA的DES加密程序-a JAVA DES encryption

base64的解码Ｃ语言实现-base64 decoding C Language