用微处理器实现数据加密的专门算法,最近逐渐引起人们的兴趣。本文概述一类以阵式移位寄存器为基础的算法,并介绍一种用莫托罗拉6800微计算机实现密钥产生装置的方法。如果这些算法可以产生周期很长的密钥流而又与机器字长无关,就可以用微处理器来实现。整个系统要求有中等存贮(1.5k的ROM,100字节的RAM),对于面向字符的终端应用,它完全可以在响应时间限制内保证数据安全。 1.引言微计算机应用方面的新近发展要求人们通过编程实现基于微处理器的专门算法。在这些应用中,以微计算机为基础的 Specialized algorithms for data encryption with microprocessors have recently gained people’s interest. This paper presents an overview of a class of array shift register based algorithms and describes a method of using a Motorola 6800 micro-computer key generation device. If these algorithms can generate long-lived keystreams that have nothing to do with the word size of the machine, they can be implemented in microprocessors. The system as a whole requires medium storage (1.5k ROM, 100 bytes of RAM) and can guarantee data security within the response time limit for character-oriented end applications. 1. INTRODUCTION Recent advances in microcomputers have required people to program specific microprocessor-based algorithms. In these applications, micro-computer-based