现代通信技术是现代信息技术的一个重要组成部分,通信的本质是快速、准确地转移信息。通信技术正在沿着数字化、宽带化、高速化和智能化、综合化、网络化的方向迅速发展。例如通信网络与多媒体联机数据库和计算机组成一体化高速网络的信息高速公路,向人们提供语音、数据、图形图像等快速通信,实现信息资源高速度共享。21世纪全世界的计算机都将通过Internet联到一起,信息安全的内涵也就发生了根本的变化。它不仅从一般性的防卫变成了一种非常普通的防范,而且还从一种专门的领域变成了无处不在。现代通信技术中的网络安全产品有以下几大特点:第一,网络安全来源于安全策略与技术的多样化,如果采用一种统一的技术和策略也就不安全了;第二,网络的安全机制与技术要不断地变化;第三,随着网络在社会个方面的延伸,进入 Modern communication technology is an important part of modern information technology. The essence of communication is to transfer information quickly and accurately. Communication technology is rapidly developing along the direction of digitization, broadband, high-speed and intelligence, integration and networking. For example, the communication network and the multimedia online database and the computer form an information superhighway with an integrated high-speed network, which provides fast communication for people such as voice, data and graphic images, and achieves high-speed sharing of information resources. In the 21st century, all the computers in the world will be linked together through the Internet, and the connotation of information security will fundamentally change. Not only has it changed from a general defense to a very ordinary one, it has also evolved from a specialized field to a ubiquitous one. Network security products in modern communication technology have the following characteristics: First, the network security comes from the diversification of security policies and technologies, and it is not safe to adopt a unified technology and strategy. Second, network security Mechanism and technology should be constantly changing; Third, as the network in the social aspects of the extension into