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随着计算机技术的迅猛发展和网络应用的普及,人类文明进入了信息化时代的新纪元,如今,计算机网络已经渗透到社会生产、生活的各个领域。一方面,作为一种信息传播媒介,它打破了人类传统交流方式,在信息的便捷流通中构建了新型的社会存在形式,对人类政治、经济、文化、生活产生深远影响;另一方面,由于计算机网络的开放性、互联性,再加上本身存在的技术弱点,致使计算机网络存在不少安全隐患。所以,探讨计算机网络的安全性,建立安全模型是当前一大时代课题,具有重大现实意义。
With the rapid development of computer technology and the popularization of network applications, human civilization has entered a new era of information age. Nowadays, computer networks have penetrated into all fields of social production and life. On the one hand, as an information medium, it broke the traditional way of human communication, built a new form of social existence in the convenient circulation of information and had a profound impact on human politics, economy, culture and life; on the other hand, Computer network openness, interconnectivity, coupled with its own technical weaknesses, resulting in a number of computer network security risks. Therefore, to explore the security of computer networks and establish a security model is a major issue of the times, with great practical significance.