古罗马在密码技术的研究和应用方面,曾经达到了一个较高的水平:古典密码中的一些主要方法是在这个时期完成的;密码技术中的一些基本概念也是在这个时期被提出来的;密码专业队伍和密码的初期专著也是在这个时期开始组建和提出的;等等。所以古罗马时期是密码学史上的一个重要时期。下面我们将密码技术的几个基本概念作简要的介绍: Ancient Rome had reached a higher level in the research and application of cryptographic techniques: some of the major methods in classical cryptography were accomplished during this period; some of the basic concepts of cryptography were also raised during this period; The initial monographs of cryptographic professionals and passwords were also formed and proposed at this time; and so on. Therefore, ancient Rome was an important period in the history of cryptography. Below we will password technology a few basic concepts for a brief introduction: