DES算法通用程序的实现

DES算法是一种数据加密标准,在数据通信和计算机网络中应用很广,但大多是用硬件和汇编语言实现,用高级的通用程序实现较复杂且速度不理想。本文提出了一种用C语言实现DES算法的方法,使用了几个技巧,且速度也能满足一般网络通信的要求。

The Implementation of DES Algorithm for General Purpose

DES algorithm is a data encryption standard of ANSI, which is used widely in computer network and data communication. In general, the implementation of DES algorithm is suitable for hardware or assembly language. For the realization of universality and transportability, this paper proposes a method to implement the DES algorithm with C language. In detail, many new methods are proposed for the implementation such as the bit operation, the generation of subkeys and the implementation of the S-BOXs. The speed of program can meet the need of computer network communication.